56816791 has 2 divisors, whose sum is σ = 56816792. Its totient is φ = 56816790.

The previous prime is 56816779. The next prime is 56816863. The reversal of 56816791 is 19761865.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56816791 - 2⁵ = 56816759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56816701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28408395 + 28408396.

It is an arithmetic number, because the mean of its divisors is an integer number (28408396).

Almost surely, 2^56816791 is an apocalyptic number.

56816791 is a deficient number, since it is larger than the sum of its proper divisors (1).

56816791 is an equidigital number, since it uses as much as digits as its factorization.

56816791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 43.

The square root of 56816791 is about 7537.6913574383. The cubic root of 56816791 is about 384.4373430594.

The spelling of 56816791 in words is "fifty-six million, eight hundred sixteen thousand, seven hundred ninety-one".