313905239 has 2 divisors, whose sum is σ = 313905240. Its totient is φ = 313905238.

The previous prime is 313905227. The next prime is 313905313. The reversal of 313905239 is 932509313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313905239 - 2²⁸ = 45469783 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 313905199 and 313905208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313905139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156952619 + 156952620.

It is an arithmetic number, because the mean of its divisors is an integer number (156952620).

Almost surely, 2^313905239 is an apocalyptic number.

313905239 is a deficient number, since it is larger than the sum of its proper divisors (1).

313905239 is an equidigital number, since it uses as much as digits as its factorization.

313905239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 313905239 is about 17717.3711086041. The cubic root of 313905239 is about 679.6200580802.

The spelling of 313905239 in words is "three hundred thirteen million, nine hundred five thousand, two hundred thirty-nine".