57918139 has 4 divisors (see below), whose sum is σ = 58651360. Its totient is φ = 57184920.

The previous prime is 57918109. The next prime is 57918173. The reversal of 57918139 is 93181975.

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

It is a cyclic number.

It is not a de Polignac number, because 57918139 - 2⁷ = 57918011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57918095 and 57918104.

It is not an unprimeable number, because it can be changed into a prime (57918109) 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, 366492 + ... + 366649.

It is an arithmetic number, because the mean of its divisors is an integer number (14662840).

Almost surely, 2^57918139 is an apocalyptic number.

57918139 is a deficient number, since it is larger than the sum of its proper divisors (733221).

57918139 is an equidigital number, since it uses as much as digits as its factorization.

57918139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733220.

The product of its digits is 68040, while the sum is 43.

The square root of 57918139 is about 7610.3967702085. The cubic root of 57918139 is about 386.9054669203.

The spelling of 57918139 in words is "fifty-seven million, nine hundred eighteen thousand, one hundred thirty-nine".