56687 has 2 divisors, whose sum is σ = 56688. Its totient is φ = 56686.

The previous prime is 56681. The next prime is 56701. The reversal of 56687 is 78665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56687 - 2⁴ = 56671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28343 + 28344.

It is an arithmetic number, because the mean of its divisors is an integer number (28344).

2⁵⁶⁶⁸⁷ is an apocalyptic number.

56687 is a deficient number, since it is larger than the sum of its proper divisors (1).

56687 is an equidigital number, since it uses as much as digits as its factorization.

56687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 56687 is about 238.0903189968. The cubic root of 56687 is about 38.4144386530.

The spelling of 56687 in words is "fifty-six thousand, six hundred eighty-seven".