56776609 has 2 divisors, whose sum is σ = 56776610. Its totient is φ = 56776608.

The previous prime is 56776607. The next prime is 56776613. The reversal of 56776609 is 90667765.

56776609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56325025 + 451584 = 7505^2 + 672^2 .

It is a cyclic number.

It is not a de Polignac number, because 56776609 - 2¹ = 56776607 is a prime.

Together with 56776607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56776607) 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, 28388304 + 28388305.

It is an arithmetic number, because the mean of its divisors is an integer number (28388305).

Almost surely, 2^56776609 is an apocalyptic number.

It is an amenable number.

56776609 is a deficient number, since it is larger than the sum of its proper divisors (1).

56776609 is an equidigital number, since it uses as much as digits as its factorization.

56776609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 56776609 is about 7535.0254810452. The cubic root of 56776609 is about 384.3466943617.

The spelling of 56776609 in words is "fifty-six million, seven hundred seventy-six thousand, six hundred nine".