157493239 has 6 divisors (see below), whose sum is σ = 159078320. Its totient is φ = 155923800.

The previous prime is 157493227. The next prime is 157493249. The reversal of 157493239 is 932394751.

It is not a de Polignac number, because 157493239 - 2⁵ = 157493207 is a prime.

It is a super-2 number, since 2×157493239² = 49608240661422242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157493195 and 157493204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157493209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2482 + ... + 17920.

Almost surely, 2^157493239 is an apocalyptic number.

157493239 is a deficient number, since it is larger than the sum of its proper divisors (1585081).

157493239 is an equidigital number, since it uses as much as digits as its factorization.

157493239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15641 (or 15540 counting only the distinct ones).

The product of its digits is 204120, while the sum is 43.

The square root of 157493239 is about 12549.6310304327. The cubic root of 157493239 is about 540.0334215711.

The spelling of 157493239 in words is "one hundred fifty-seven million, four hundred ninety-three thousand, two hundred thirty-nine".