57109139 has 2 divisors, whose sum is σ = 57109140. Its totient is φ = 57109138.

The previous prime is 57109127. The next prime is 57109147. The reversal of 57109139 is 93190175.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57109139 is a prime.

It is a super-2 number, since 2×57109139² = 6522907514642642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57109099 and 57109108.

It is not a weakly prime, because it can be changed into another prime (57109189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28554569 + 28554570.

It is an arithmetic number, because the mean of its divisors is an integer number (28554570).

Almost surely, 2^57109139 is an apocalyptic number.

57109139 is a deficient number, since it is larger than the sum of its proper divisors (1).

57109139 is an equidigital number, since it uses as much as digits as its factorization.

57109139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 57109139 is about 7557.0588855718. The cubic root of 57109139 is about 385.0955831717.

The spelling of 57109139 in words is "fifty-seven million, one hundred nine thousand, one hundred thirty-nine".