313687 has 4 divisors (see below), whose sum is σ = 342216. Its totient is φ = 285160.

The previous prime is 313679. The next prime is 313699. The reversal of 313687 is 786313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786313 = 11 ⋅71483.

It is a cyclic number.

It is not a de Polignac number, because 313687 - 2³ = 313679 is a prime.

It is a Duffinian number.

313687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313637) 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, 14248 + ... + 14269.

It is an arithmetic number, because the mean of its divisors is an integer number (85554).

2³¹³⁶⁸⁷ is an apocalyptic number.

313687 is a deficient number, since it is larger than the sum of its proper divisors (28529).

313687 is a wasteful number, since it uses less digits than its factorization.

313687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28528.

The product of its digits is 3024, while the sum is 28.

The square root of 313687 is about 560.0776731847. The cubic root of 313687 is about 67.9462522228.

It can be divided in two parts, 31368 and 7, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 313687 in words is "three hundred thirteen thousand, six hundred eighty-seven".