57139039 has 2 divisors, whose sum is σ = 57139040. Its totient is φ = 57139038.

The previous prime is 57139037. The next prime is 57139079. The reversal of 57139039 is 93093175.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57139039 - 2¹ = 57139037 is a prime.

Together with 57139037, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 57138989 and 57139007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57139031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28569519 + 28569520.

It is an arithmetic number, because the mean of its divisors is an integer number (28569520).

Almost surely, 2^57139039 is an apocalyptic number.

57139039 is a deficient number, since it is larger than the sum of its proper divisors (1).

57139039 is an equidigital number, since it uses as much as digits as its factorization.

57139039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 57139039 is about 7559.0369095540. The cubic root of 57139039 is about 385.1627781907.

The spelling of 57139039 in words is "fifty-seven million, one hundred thirty-nine thousand, thirty-nine".