57479139 has 20 divisors (see below), whose sum is σ = 89600016. Its totient is φ = 36652176.

The previous prime is 57479129. The next prime is 57479153. The reversal of 57479139 is 93197475.

57479139 is a `hidden beast` number, since 574 + 79 + 1 + 3 + 9 = 666.

It is not a de Polignac number, because 57479139 - 2²¹ = 55381987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57479094 and 57479103.

It is not an unprimeable number, because it can be changed into a prime (57479119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13564 + ... + 17289.

Almost surely, 2^57479139 is an apocalyptic number.

57479139 is a deficient number, since it is larger than the sum of its proper divisors (32120877).

57479139 is a wasteful number, since it uses less digits than its factorization.

57479139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30888 (or 30879 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 57479139 is about 7581.4997856625. The cubic root of 57479139 is about 385.9254489257.

The spelling of 57479139 in words is "fifty-seven million, four hundred seventy-nine thousand, one hundred thirty-nine".