57156739 has 2 divisors, whose sum is σ = 57156740. Its totient is φ = 57156738.

The previous prime is 57156727. The next prime is 57156763. The reversal of 57156739 is 93765175.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57156739 - 2⁵ = 57156707 is a prime.

It is a super-2 number, since 2×57156739² = 6533785626228242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57156695 and 57156704.

It is not a weakly prime, because it can be changed into another prime (57150739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28578369 + 28578370.

It is an arithmetic number, because the mean of its divisors is an integer number (28578370).

Almost surely, 2^57156739 is an apocalyptic number.

57156739 is a deficient number, since it is larger than the sum of its proper divisors (1).

57156739 is an equidigital number, since it uses as much as digits as its factorization.

57156739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 198450, while the sum is 43.

The square root of 57156739 is about 7560.2076029696. The cubic root of 57156739 is about 385.2025447990.

The spelling of 57156739 in words is "fifty-seven million, one hundred fifty-six thousand, seven hundred thirty-nine".