56774891 has 2 divisors, whose sum is σ = 56774892. Its totient is φ = 56774890.

The previous prime is 56774867. The next prime is 56774911. The reversal of 56774891 is 19847765.

56774891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56774891 - 2¹⁸ = 56512747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56774191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28387445 + 28387446.

It is an arithmetic number, because the mean of its divisors is an integer number (28387446).

Almost surely, 2^56774891 is an apocalyptic number.

56774891 is a deficient number, since it is larger than the sum of its proper divisors (1).

56774891 is an equidigital number, since it uses as much as digits as its factorization.

56774891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 56774891 is about 7534.9114792411. The cubic root of 56774891 is about 384.3428176814.

The spelling of 56774891 in words is "fifty-six million, seven hundred seventy-four thousand, eight hundred ninety-one".