315944957 has 2 divisors, whose sum is σ = 315944958. Its totient is φ = 315944956.

The previous prime is 315944947. The next prime is 315944987. The reversal of 315944957 is 759449513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311840281 + 4104676 = 17659^2 + 2026^2 .

It is a cyclic number.

It is not a de Polignac number, because 315944957 - 2⁸ = 315944701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315944917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157972478 + 157972479.

It is an arithmetic number, because the mean of its divisors is an integer number (157972479).

Almost surely, 2^315944957 is an apocalyptic number.

It is an amenable number.

315944957 is a deficient number, since it is larger than the sum of its proper divisors (1).

315944957 is an equidigital number, since it uses as much as digits as its factorization.

315944957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 315944957 is about 17774.8405618728. The cubic root of 315944957 is about 681.0889106308.

The spelling of 315944957 in words is "three hundred fifteen million, nine hundred forty-four thousand, nine hundred fifty-seven".