56840977 has 2 divisors, whose sum is σ = 56840978. Its totient is φ = 56840976.

The previous prime is 56840941. The next prime is 56840983. The reversal of 56840977 is 77904865.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35533521 + 21307456 = 5961^2 + 4616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56840977 is a prime.

It is not a weakly prime, because it can be changed into another prime (56843977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28420488 + 28420489.

It is an arithmetic number, because the mean of its divisors is an integer number (28420489).

Almost surely, 2^56840977 is an apocalyptic number.

It is an amenable number.

56840977 is a deficient number, since it is larger than the sum of its proper divisors (1).

56840977 is an equidigital number, since it uses as much as digits as its factorization.

56840977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 56840977 is about 7539.2955241189. The cubic root of 56840977 is about 384.4918849322.

The spelling of 56840977 in words is "fifty-six million, eight hundred forty thousand, nine hundred seventy-seven".