157915393 has 4 divisors (see below), whose sum is σ = 161587888. Its totient is φ = 154242900.

The previous prime is 157915369. The next prime is 157915399. The reversal of 157915393 is 393519751.

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.

It is a cyclic number.

It is not a de Polignac number, because 157915393 - 2⁵ = 157915361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 3672451 = 157915393 / (1 + 5 + 7 + 9 + 1 + 5 + 3 + 9 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157915399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836183 + ... + 1836268.

It is an arithmetic number, because the mean of its divisors is an integer number (40396972).

Almost surely, 2^157915393 is an apocalyptic number.

It is an amenable number.

157915393 is a deficient number, since it is larger than the sum of its proper divisors (3672495).

157915393 is an equidigital number, since it uses as much as digits as its factorization.

157915393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672494.

The product of its digits is 127575, while the sum is 43.

The square root of 157915393 is about 12566.4391535550. The cubic root of 157915393 is about 540.5155033815.

The spelling of 157915393 in words is "one hundred fifty-seven million, nine hundred fifteen thousand, three hundred ninety-three".