157136839 has 4 divisors (see below), whose sum is σ = 160480224. Its totient is φ = 153793456.

The previous prime is 157136827. The next prime is 157136849. The reversal of 157136839 is 938631751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938631751 = 163 ⋅5758477.

It is a cyclic number.

It is not a de Polignac number, because 157136839 - 2⁷ = 157136711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157136795 and 157136804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157136849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671622 + ... + 1671715.

It is an arithmetic number, because the mean of its divisors is an integer number (40120056).

Almost surely, 2^157136839 is an apocalyptic number.

157136839 is a deficient number, since it is larger than the sum of its proper divisors (3343385).

157136839 is an equidigital number, since it uses as much as digits as its factorization.

157136839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343384.

The product of its digits is 136080, while the sum is 43.

The square root of 157136839 is about 12535.4233674017. The cubic root of 157136839 is about 539.6257569258.

The spelling of 157136839 in words is "one hundred fifty-seven million, one hundred thirty-six thousand, eight hundred thirty-nine".