56977993 has 2 divisors, whose sum is σ = 56977994. Its totient is φ = 56977992.

The previous prime is 56977957. The next prime is 56978003. The reversal of 56977993 is 39977965.

56977993 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 can be written as a sum of positive squares in only one way, i.e., 28590409 + 28387584 = 5347^2 + 5328^2 .

It is a cyclic number.

It is not a de Polignac number, because 56977993 - 2¹⁷ = 56846921 is a prime.

It is not a weakly prime, because it can be changed into another prime (56977913) 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, 28488996 + 28488997.

It is an arithmetic number, because the mean of its divisors is an integer number (28488997).

Almost surely, 2^56977993 is an apocalyptic number.

It is an amenable number.

56977993 is a deficient number, since it is larger than the sum of its proper divisors (1).

56977993 is an equidigital number, since it uses as much as digits as its factorization.

56977993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3214890, while the sum is 55.

The square root of 56977993 is about 7548.3768453887. The cubic root of 56977993 is about 384.8005781180.

It can be divided in two parts, 56977 and 993, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 56977993 in words is "fifty-six million, nine hundred seventy-seven thousand, nine hundred ninety-three".