56590813 has 4 divisors (see below), whose sum is σ = 57435520. Its totient is φ = 55746108.

The previous prime is 56590801. The next prime is 56590843. The reversal of 56590813 is 31809565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56590813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56590843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422253 + ... + 422386.

It is an arithmetic number, because the mean of its divisors is an integer number (14358880).

Almost surely, 2^56590813 is an apocalyptic number.

It is an amenable number.

56590813 is a deficient number, since it is larger than the sum of its proper divisors (844707).

56590813 is an equidigital number, since it uses as much as digits as its factorization.

56590813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844706.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 56590813 is about 7522.6865546824. The cubic root of 56590813 is about 383.9269903333.

It can be divided in two parts, 565 and 90813, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 56590813 in words is "fifty-six million, five hundred ninety thousand, eight hundred thirteen".