157039999 has 12 divisors (see below), whose sum is σ = 170714104. Its totient is φ = 144353664.

The previous prime is 157039991. The next prime is 157040003. The reversal of 157039999 is 999930751.

It is not a de Polignac number, because 157039999 - 2³ = 157039991 is a prime.

It is a super-2 number, since 2×157039999² = 49323122571840002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157039991) 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, 6109 + ... + 18745.

Almost surely, 2^157039999 is an apocalyptic number.

157039999 is a deficient number, since it is larger than the sum of its proper divisors (13674105).

157039999 is a wasteful number, since it uses less digits than its factorization.

157039999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12714 (or 12697 counting only the distinct ones).

The product of its (nonzero) digits is 688905, while the sum is 52.

The square root of 157039999 is about 12531.5601183572. The cubic root of 157039999 is about 539.5148809586.

The spelling of 157039999 in words is "one hundred fifty-seven million, thirty-nine thousand, nine hundred ninety-nine".