56564687 has 2 divisors, whose sum is σ = 56564688. Its totient is φ = 56564686.

The previous prime is 56564671. The next prime is 56564689. The reversal of 56564687 is 78646565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56564687 - 2⁴ = 56564671 is a prime.

Together with 56564689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56564689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28282343 + 28282344.

It is an arithmetic number, because the mean of its divisors is an integer number (28282344).

Almost surely, 2^56564687 is an apocalyptic number.

56564687 is a deficient number, since it is larger than the sum of its proper divisors (1).

56564687 is an equidigital number, since it uses as much as digits as its factorization.

56564687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 47.

The square root of 56564687 is about 7520.9498735200. The cubic root of 56564687 is about 383.8678993490.

The spelling of 56564687 in words is "fifty-six million, five hundred sixty-four thousand, six hundred eighty-seven".