56816687 has 2 divisors, whose sum is σ = 56816688. Its totient is φ = 56816686.

The previous prime is 56816671. The next prime is 56816701. The reversal of 56816687 is 78661865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56816687 - 2⁴ = 56816671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56866687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28408343 + 28408344.

It is an arithmetic number, because the mean of its divisors is an integer number (28408344).

Almost surely, 2^56816687 is an apocalyptic number.

56816687 is a deficient number, since it is larger than the sum of its proper divisors (1).

56816687 is an equidigital number, since it uses as much as digits as its factorization.

56816687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 56816687 is about 7537.6844587711. The cubic root of 56816687 is about 384.4371084955.

The spelling of 56816687 in words is "fifty-six million, eight hundred sixteen thousand, six hundred eighty-seven".