315685997 has 4 divisors (see below), whose sum is σ = 344384736. Its totient is φ = 286987260.

The previous prime is 315685987. The next prime is 315686057. The reversal of 315685997 is 799586513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315685997 - 2⁶ = 315685933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315685907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14349353 + ... + 14349374.

It is an arithmetic number, because the mean of its divisors is an integer number (86096184).

Almost surely, 2^315685997 is an apocalyptic number.

It is an amenable number.

315685997 is a deficient number, since it is larger than the sum of its proper divisors (28698739).

315685997 is a wasteful number, since it uses less digits than its factorization.

315685997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28698738.

The product of its digits is 2041200, while the sum is 53.

The square root of 315685997 is about 17767.5546150842. The cubic root of 315685997 is about 680.9027780044.

The spelling of 315685997 in words is "three hundred fifteen million, six hundred eighty-five thousand, nine hundred ninety-seven".