57564977 has 2 divisors, whose sum is σ = 57564978. Its totient is φ = 57564976.

The previous prime is 57564973. The next prime is 57564979. The reversal of 57564977 is 77946575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30514576 + 27050401 = 5524^2 + 5201^2 .

It is a cyclic number.

It is not a de Polignac number, because 57564977 - 2² = 57564973 is a prime.

Together with 57564979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57564973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28782488 + 28782489.

It is an arithmetic number, because the mean of its divisors is an integer number (28782489).

Almost surely, 2^57564977 is an apocalyptic number.

It is an amenable number.

57564977 is a deficient number, since it is larger than the sum of its proper divisors (1).

57564977 is an equidigital number, since it uses as much as digits as its factorization.

57564977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1852200, while the sum is 50.

The square root of 57564977 is about 7587.1586908407. The cubic root of 57564977 is about 386.1174640494.

The spelling of 57564977 in words is "fifty-seven million, five hundred sixty-four thousand, nine hundred seventy-seven".