56813917 has 4 divisors (see below), whose sum is σ = 58646656. Its totient is φ = 54981180.

The previous prime is 56813899. The next prime is 56813921. The reversal of 56813917 is 71931865.

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-56813917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56813917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56813927) 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, 916323 + ... + 916384.

It is an arithmetic number, because the mean of its divisors is an integer number (14661664).

Almost surely, 2^56813917 is an apocalyptic number.

It is an amenable number.

56813917 is a deficient number, since it is larger than the sum of its proper divisors (1832739).

56813917 is a wasteful number, since it uses less digits than its factorization.

56813917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832738.

The product of its digits is 45360, while the sum is 40.

The square root of 56813917 is about 7537.5007131011. The cubic root of 56813917 is about 384.4308608703.

The spelling of 56813917 in words is "fifty-six million, eight hundred thirteen thousand, nine hundred seventeen".