315687 has 4 divisors (see below), whose sum is σ = 420920. Its totient is φ = 210456.

The previous prime is 315677. The next prime is 315691. The reversal of 315687 is 786513.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 315687 - 2⁴ = 315671 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315687.

It is not an unprimeable number, because it can be changed into a prime (315617) 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, 52612 + ... + 52617.

It is an arithmetic number, because the mean of its divisors is an integer number (105230).

2³¹⁵⁶⁸⁷ is an apocalyptic number.

315687 is a deficient number, since it is larger than the sum of its proper divisors (105233).

315687 is a wasteful number, since it uses less digits than its factorization.

315687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105232.

The product of its digits is 5040, while the sum is 30.

The square root of 315687 is about 561.8603029224. The cubic root of 315687 is about 68.0903499127.

The spelling of 315687 in words is "three hundred fifteen thousand, six hundred eighty-seven".