315697 has 2 divisors, whose sum is σ = 315698. Its totient is φ = 315696.

The previous prime is 315691. The next prime is 315701. The reversal of 315697 is 796513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309136 + 6561 = 556^2 + 81^2 .

It is a cyclic number.

It is not a de Polignac number, because 315697 - 2⁷ = 315569 is a prime.

It is not a weakly prime, because it can be changed into another prime (315691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157848 + 157849.

It is an arithmetic number, because the mean of its divisors is an integer number (157849).

2³¹⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

315697 is a deficient number, since it is larger than the sum of its proper divisors (1).

315697 is an equidigital number, since it uses as much as digits as its factorization.

315697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 31.

The square root of 315697 is about 561.8692018611. The cubic root of 315697 is about 68.0910688699.

The spelling of 315697 in words is "three hundred fifteen thousand, six hundred ninety-seven".