57257979 has 8 divisors (see below), whose sum is σ = 76414272. Its totient is φ = 38136840.

The previous prime is 57257969. The next prime is 57258007. The reversal of 57257979 is 97975275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57257979 - 2¹² = 57253883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57257909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4717 + ... + 11694.

It is an arithmetic number, because the mean of its divisors is an integer number (9551784).

Almost surely, 2^57257979 is an apocalyptic number.

57257979 is a deficient number, since it is larger than the sum of its proper divisors (19156293).

57257979 is a wasteful number, since it uses less digits than its factorization.

57257979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17577.

The product of its digits is 1389150, while the sum is 51.

The square root of 57257979 is about 7566.9002240019. The cubic root of 57257979 is about 385.4298431817.

The spelling of 57257979 in words is "fifty-seven million, two hundred fifty-seven thousand, nine hundred seventy-nine".