57147939 has 24 divisors (see below), whose sum is σ = 87778080. Its totient is φ = 35747712.

The previous prime is 57147929. The next prime is 57147947. The reversal of 57147939 is 93974175.

57147939 is a `hidden beast` number, since 571 + 4 + 79 + 3 + 9 = 666.

It is not a de Polignac number, because 57147939 - 2⁸ = 57147683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57147894 and 57147903.

It is not an unprimeable number, because it can be changed into a prime (57147919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8367 + ... + 13575.

It is an arithmetic number, because the mean of its divisors is an integer number (3657420).

Almost surely, 2^57147939 is an apocalyptic number.

57147939 is a deficient number, since it is larger than the sum of its proper divisors (30630141).

57147939 is a wasteful number, since it uses less digits than its factorization.

57147939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5291 (or 5288 counting only the distinct ones).

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

The square root of 57147939 is about 7559.6255859665. The cubic root of 57147939 is about 385.1827748563.

The spelling of 57147939 in words is "fifty-seven million, one hundred forty-seven thousand, nine hundred thirty-nine".