157399361 has 4 divisors (see below), whose sum is σ = 179884992. Its totient is φ = 134913732.

The previous prime is 157399357. The next prime is 157399367. The reversal of 157399361 is 163993751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 163993751 = 31 ⋅5290121.

It is a cyclic number.

It is not a de Polignac number, because 157399361 - 2² = 157399357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157399367) 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, 11242805 + ... + 11242818.

It is an arithmetic number, because the mean of its divisors is an integer number (44971248).

Almost surely, 2^157399361 is an apocalyptic number.

It is an amenable number.

157399361 is a deficient number, since it is larger than the sum of its proper divisors (22485631).

157399361 is an equidigital number, since it uses as much as digits as its factorization.

157399361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22485630.

The product of its digits is 153090, while the sum is 44.

The square root of 157399361 is about 12545.8902035687. The cubic root of 157399361 is about 539.9260998551.

The spelling of 157399361 in words is "one hundred fifty-seven million, three hundred ninety-nine thousand, three hundred sixty-one".