56716813 has 2 divisors, whose sum is σ = 56716814. Its totient is φ = 56716812.

The previous prime is 56716801. The next prime is 56716841. The reversal of 56716813 is 31861765.

56716813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55086084 + 1630729 = 7422^2 + 1277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56716813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56710813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28358406 + 28358407.

It is an arithmetic number, because the mean of its divisors is an integer number (28358407).

Almost surely, 2^56716813 is an apocalyptic number.

It is an amenable number.

56716813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56716813 is an equidigital number, since it uses as much as digits as its factorization.

56716813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 56716813 is about 7531.0565659806. The cubic root of 56716813 is about 384.2117181907.

The spelling of 56716813 in words is "fifty-six million, seven hundred sixteen thousand, eight hundred thirteen".