315689 has 6 divisors (see below), whose sum is σ = 347130. Its totient is φ = 286880.

The previous prime is 315677. The next prime is 315691. The reversal of 315689 is 986513.

It can be written as a sum of positive squares in only one way, i.e., 267289 + 48400 = 517^2 + 220^2 .

It is not a de Polignac number, because 315689 - 2¹⁶ = 250153 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (57855).

2³¹⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

315689 is a deficient number, since it is larger than the sum of its proper divisors (31441).

315689 is a wasteful number, since it uses less digits than its factorization.

315689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631 (or 2620 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 315689 is about 561.8620827214. The cubic root of 315689 is about 68.0904937053.

The spelling of 315689 in words is "three hundred fifteen thousand, six hundred eighty-nine".