57120997 has 4 divisors (see below), whose sum is σ = 57138796. Its totient is φ = 57103200.

The previous prime is 57120989. The next prime is 57121021. The reversal of 57120997 is 79902175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4137156 + 52983841 = 2034^2 + 7279^2 .

It is a cyclic number.

It is not a de Polignac number, because 57120997 - 2³ = 57120989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57120977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2598 + ... + 10999.

It is an arithmetic number, because the mean of its divisors is an integer number (14284699).

Almost surely, 2^57120997 is an apocalyptic number.

It is an amenable number.

57120997 is a deficient number, since it is larger than the sum of its proper divisors (17799).

57120997 is a wasteful number, since it uses less digits than its factorization.

57120997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17798.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 57120997 is about 7557.8434093331. The cubic root of 57120997 is about 385.1222347578.

The spelling of 57120997 in words is "fifty-seven million, one hundred twenty thousand, nine hundred ninety-seven".