313 (number)

313 is: • a twin prime with 311 • a centered square number • a full reptend prime (and the smallest number which is a full reptend prime in base 10 but not in base 2 to 9) • a Pythagorean prime • a regular prime • a palindromic prime in both decimal and binary. • a truncatable prime • a weakly prime in base 5 • a happy number • an Armstrong number - in base 4 ( 3×42 + 1×41 + 3×40 = 33 + 13 + 33 ) • an index of a prime Lucas number. • a palindromic number in base 2 (100111001) ==In religion ==

• The number of times the word pray appears in the King James Bible. • The number of soldiers that Muhammad had with him in the first battle fought by the Muslims, the Battle of Badr. ==References==