56355977 has 2 divisors, whose sum is σ = 56355978. Its totient is φ = 56355976.

The previous prime is 56355973. The next prime is 56355989. The reversal of 56355977 is 77955365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 942841 = 7444^2 + 971^2 .

It is a cyclic number.

It is not a de Polignac number, because 56355977 - 2² = 56355973 is a prime.

It is a super-2 number, since 2×56355977² = 6351992287249058, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56355973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28177988 + 28177989.

It is an arithmetic number, because the mean of its divisors is an integer number (28177989).

Almost surely, 2^56355977 is an apocalyptic number.

It is an amenable number.

56355977 is a deficient number, since it is larger than the sum of its proper divisors (1).

56355977 is an equidigital number, since it uses as much as digits as its factorization.

56355977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 992250, while the sum is 47.

The square root of 56355977 is about 7507.0618087238. The cubic root of 56355977 is about 383.3951909418.

The spelling of 56355977 in words is "fifty-six million, three hundred fifty-five thousand, nine hundred seventy-seven".