57839913 has 10 divisors (see below), whose sum is σ = 86402954. Its totient is φ = 38559888.

The previous prime is 57839909. The next prime is 57839923. The reversal of 57839913 is 31993875.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29452329 + 28387584 = 5427^2 + 5328^2 .

It is not a de Polignac number, because 57839913 - 2² = 57839909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57839923) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 356956 + ... + 357117.

Almost surely, 2^57839913 is an apocalyptic number.

It is an amenable number.

57839913 is a deficient number, since it is larger than the sum of its proper divisors (28563041).

57839913 is an equidigital number, since it uses as much as digits as its factorization.

57839913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714085 (or 714076 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 57839913 is about 7605.2556170059. The cubic root of 57839913 is about 386.7311996763.

The spelling of 57839913 in words is "fifty-seven million, eight hundred thirty-nine thousand, nine hundred thirteen".