56816779 has 2 divisors, whose sum is σ = 56816780. Its totient is φ = 56816778.

The previous prime is 56816761. The next prime is 56816791. The reversal of 56816779 is 97761865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56816779 - 2⁷ = 56816651 is a prime.

It is not a weakly prime, because it can be changed into another prime (56816759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28408389 + 28408390.

It is an arithmetic number, because the mean of its divisors is an integer number (28408390).

Almost surely, 2^56816779 is an apocalyptic number.

56816779 is a deficient number, since it is larger than the sum of its proper divisors (1).

56816779 is an equidigital number, since it uses as much as digits as its factorization.

56816779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 56816779 is about 7537.6905614386. The cubic root of 56816779 is about 384.4373159944.

The spelling of 56816779 in words is "fifty-six million, eight hundred sixteen thousand, seven hundred seventy-nine".