57139994 has 8 divisors (see below), whose sum is σ = 85774260. Its totient is φ = 28548576.

The previous prime is 57139961. The next prime is 57140021. The reversal of 57139994 is 49993175.

It can be written as a sum of positive squares in 2 ways, for example, as 54538225 + 2601769 = 7385^2 + 1613^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7139 + ... + 12854.

Almost surely, 2^57139994 is an apocalyptic number.

57139994 is a deficient number, since it is larger than the sum of its proper divisors (28634266).

57139994 is a wasteful number, since it uses less digits than its factorization.

57139994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21424.

The product of its digits is 306180, while the sum is 47.

The square root of 57139994 is about 7559.1000787131. The cubic root of 57139994 is about 385.1649239998.

The spelling of 57139994 in words is "fifty-seven million, one hundred thirty-nine thousand, nine hundred ninety-four".