157323613 has 4 divisors (see below), whose sum is σ = 157820220. Its totient is φ = 156827008.

The previous prime is 157323599. The next prime is 157323623. The reversal of 157323613 is 316323751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316323751 = 277 ⋅1141963.

It can be written as a sum of positive squares in 2 ways, for example, as 23990404 + 133333209 = 4898^2 + 11547^2 .

It is a cyclic number.

It is not a de Polignac number, because 157323613 - 2⁵ = 157323581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157323623) 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, 247828 + ... + 248461.

It is an arithmetic number, because the mean of its divisors is an integer number (39455055).

Almost surely, 2^157323613 is an apocalyptic number.

It is an amenable number.

157323613 is a deficient number, since it is larger than the sum of its proper divisors (496607).

157323613 is an equidigital number, since it uses as much as digits as its factorization.

157323613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496606.

The product of its digits is 11340, while the sum is 31.

The square root of 157323613 is about 12542.8710030838. The cubic root of 157323613 is about 539.8394733181.

The spelling of 157323613 in words is "one hundred fifty-seven million, three hundred twenty-three thousand, six hundred thirteen".