100,000,001 to 199,999,999 •
100,000,007 = smallest nine digit prime •
100,005,153 = smallest
triangular number with 9 digits and the 14,142nd triangular number •
100,020,001 = 100012, palindromic square •
100,544,625 = 4653, the smallest 9-digit cube •
102,030,201 = 101012, palindromic square •
102,334,155 =
Fibonacci number •
102,400,000 = 405 •
104,060,401 = 102012 = 1014, palindromic square •
104,636,890 = number of
trees with 25 unlabeled nodes •
105,413,504 = 147 •
107,890,609 =
Wedderburn-Etherington number •
111,111,111 =
repunit,
square root of 12345678987654321 •
111,111,113 =
Chen prime,
Sophie Germain prime,
cousin prime. •
113,379,904 = 106482 = 4843 = 226 •
115,856,201 = 415 •
119,481,296 = logarithmic number •
120,528,657 = number of centered hydrocarbons with 27 carbon atoms •
121,242,121 = 110112, palindromic square •
122,522,400 = least number m such that \frac{\sigma(m)}{m} > 5, where \sigma(m) = sum of divisors of m •
123,454,321 = 111112, palindromic square •
123,456,789 = smallest zeroless
base-10 pandigital number •
125,686,521 = 112112,
palindromic square •
126,390,032 = number of 34-bead necklaces (turning over is allowed) where
complements are equivalent •
126,491,971 =
Leonardo prime •
129,140,163 = 317 •
129,145,076 =
Leyland number using 3 & 17 (317 + 173) •
129,644,790 =
Catalan number •
130,150,588 = number of 33-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed •
130,691,232 = 425 •
134,217,728 = 5123 = 89 = 227 •
134,218,457 = Leyland number using 2 & 27 (227 + 272) •
134,219,796 = number of 32-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple 32-stage cycling shift register; also number of binary irreducible polynomials whose degree divides 32 •
136,048,896 = 116642 = 1084 •
136,279,841 = The largest known
Mersenne prime exponent, as of October 2024 •
139,854,276 = 118262, the smallest zeroless base 10 pandigital square •
142,547,559 =
Motzkin number •
147,008,443 = 435 •
148,035,889 = 121672 = 5293 = 236 •
157,115,917 = number of parallelogram polyominoes with 24 cells. •
157,351,936 = 125442 = 1124 •
164,916,224 = 445 •
165,580,141 =
Fibonacci number •
167,444,795 =
cyclic number in
base 6 •
170,859,375 = 157 •
171,794,492 = number of reduced trees with 36 nodes •
177,264,449 = Leyland number using 8 & 9 (89 + 98) •
178,956,971 = smallest composite
Wagstaff number with prime index •
179,424,673 = 10,000,000th
prime number •
184,528,125 = 455 •
185,794,560 = double factorial of 18 •
188,378,402 = number of ways to partition {1,2,...,11} and then partition each cell (block) into subcells. •
190,899,322 =
Bell number •
191,102,976 = 138242 = 5763 = 246 •
192,622,052 = number of free 18-ominoes •
193,707,721 = smallest prime factor of 267 − 1, a number that Mersenne claimed to be prime •
199,960,004 = number of surface-points of a tetrahedron with edge-length 9999
200,000,000 to 299,999,999 •
200,000,002 = number of surface-points of a tetrahedron with edge-length 10000 •
212,890,625 = 1-
automorphic number •
214,358,881 = 146412 = 1214 = 118 •
222,222,222 =
repdigit •
222,222,227 =
safe prime •
223,092,870 = the product of the first nine
prime numbers, thus the ninth
primorial •
225,058,681 =
Pell number •
225,331,713 =
self-descriptive number in base 9 •
229,345,007 = 475 •
232,792,560 =
superior highly composite number;
colossally abundant number; smallest number divisible by the numbers from 1 to 22 (there is no smaller number divisible by the numbers from 1 to 20 since any number divisible by 3 and 7 must be divisible by 21 and any number divisible by 2 and 11 must be divisible by 22) •
240,882,152 = number of signed trees with 16 nodes •
244,140,625 = 156252 = 1253 = 256 = 512 •
244,389,457 =
Leyland number •
245,044,800 = first
highly composite number that is not a
Harshad number •
245,492,244 = number of 35-bead necklaces (turning over is allowed) where complements are equivalent •
405,071,317 = 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99 •
410,338,673 = 177 •
418,195,493 = 535 •
429,981,696 = 207362 = 1444 = 128 = 100,000,00012 AKA a gross-great-great-gross (10012 great-great-grosses) •
433,494,437 =
Fibonacci prime, Markov prime •
442,386,619 =
alternating factorial •
444,101,658 = number of (unordered, unlabeled) rooted trimmed trees with 27 nodes •
444,444,444 =
repdigit •
455,052,511 = number of primes below 1010 •
459,165,024 = 545 •
467,871,369 = number of triangle-free graphs on 14 vertices •
477,353,376 = number of 36-bead necklaces (turning over is allowed) where complements are equivalent •
479,001,600 = 12! •
481,890,304 = 219522 = 7843 = 286 •
490,853,416 = number of 35-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed •
543,339,720 = Pell number •
574,304,985 = 19 + 29 + 39 + 49 + 59 + 69 + 79 + 89 + 99 •
575,023,344 = 14-th derivative of xx at x=1 •
594,823,321 = 243892 = 8413 = 296 •
596,572,387 = Wedderburn-Etherington prime Jacobsthal prime •
725,594,112 = number of primitive polynomials of degree 36 over GF(2) •
844,596,301 = 615 •
855,036,081 = 1714 •
875,213,056 = 1724 •
887,503,681 = 316 •
888,888,888 =
repdigit •
893,554,688 = 2-
automorphic number •
893,871,739 = 197 •
895,745,041 = 1734
900,000,000 to 999,999,999 •
906,150,257 = smallest counterexample to the
Polya conjecture •
916,132,832 = 625 •
923,187,456 = 303842, the largest zeroless
base-10 pandigital square •
928,772,650 = number of 37-bead necklaces (turning over is allowed) where complements are equivalent •
929,275,200 = number of primitive polynomials of degree 35 over GF(2) •
942,060,249 = 306932, palindromic square •
981,706,832 = number of 35-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple 35-stage cycling shift register; also number of binary irreducible polynomials whose degree divides 35 •
987,654,321 = largest zeroless base-10 pandigital number •
992,436,543 = 635 •
997,002,999 = 9993, the largest 9-digit cube •
999,950,884 = 316222, the largest 9-digit square •
999,961,560 = largest
triangular number with 9 digits and the 44,720th triangular number •
999,999,937 = largest 9-digit prime number •
999,999,999 =
repdigit == Notes ==