56686913 has 2 divisors, whose sum is σ = 56686914. Its totient is φ = 56686912.

The previous prime is 56686907. The next prime is 56686963. The reversal of 56686913 is 31968665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56670784 + 16129 = 7528^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 56686913 - 2⁸ = 56686657 is a prime.

It is a super-2 number, since 2×56686913² = 6426812210939138, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56686963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28343456 + 28343457.

It is an arithmetic number, because the mean of its divisors is an integer number (28343457).

Almost surely, 2^56686913 is an apocalyptic number.

It is an amenable number.

56686913 is a deficient number, since it is larger than the sum of its proper divisors (1).

56686913 is an equidigital number, since it uses as much as digits as its factorization.

56686913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 56686913 is about 7529.0711910567. The cubic root of 56686913 is about 384.1441900093.

The spelling of 56686913 in words is "fifty-six million, six hundred eighty-six thousand, nine hundred thirteen".