157864939 has 12 divisors (see below), whose sum is σ = 173864016. Its totient is φ = 143046288.

The previous prime is 157864897. The next prime is 157864969. The reversal of 157864939 is 939468751.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-157864939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157864969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1204 + ... + 17809.

It is an arithmetic number, because the mean of its divisors is an integer number (14488668).

Almost surely, 2^157864939 is an apocalyptic number.

157864939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

157864939 is a deficient number, since it is larger than the sum of its proper divisors (15999077).

157864939 is a wasteful number, since it uses less digits than its factorization.

157864939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19074 (or 19055 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 52.

The square root of 157864939 is about 12564.4315032555. The cubic root of 157864939 is about 540.4579323122.

The spelling of 157864939 in words is "one hundred fifty-seven million, eight hundred sixty-four thousand, nine hundred thirty-nine".