56577817 has 2 divisors, whose sum is σ = 56577818. Its totient is φ = 56577816.

The previous prime is 56577803. The next prime is 56577823. The reversal of 56577817 is 71877565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55890576 + 687241 = 7476^2 + 829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56577817 is a prime.

It is not a weakly prime, because it can be changed into another prime (56557817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28288908 + 28288909.

It is an arithmetic number, because the mean of its divisors is an integer number (28288909).

Almost surely, 2^56577817 is an apocalyptic number.

It is an amenable number.

56577817 is a deficient number, since it is larger than the sum of its proper divisors (1).

56577817 is an equidigital number, since it uses as much as digits as its factorization.

56577817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411600, while the sum is 46.

The square root of 56577817 is about 7521.8227179321. The cubic root of 56577817 is about 383.8975986535.

The spelling of 56577817 in words is "fifty-six million, five hundred seventy-seven thousand, eight hundred seventeen".