157397961 has 16 divisors (see below), whose sum is σ = 240041984. Its totient is φ = 89867664.

The previous prime is 157397959. The next prime is 157397987. The reversal of 157397961 is 169793751.

157397961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157397961 - 2¹ = 157397959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157397961.

It is not an unprimeable number, because it can be changed into a prime (157397921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32670 + ... + 37176.

It is an arithmetic number, because the mean of its divisors is an integer number (15002624).

Almost surely, 2^157397961 is an apocalyptic number.

It is an amenable number.

157397961 is a deficient number, since it is larger than the sum of its proper divisors (82644023).

157397961 is a wasteful number, since it uses less digits than its factorization.

157397961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180.

The product of its digits is 357210, while the sum is 48.

The square root of 157397961 is about 12545.8344082807. The cubic root of 157397961 is about 539.9244990464.

Subtracting from 157397961 its product of digits (357210), we obtain a palindrome (157040751).

The spelling of 157397961 in words is "one hundred fifty-seven million, three hundred ninety-seven thousand, nine hundred sixty-one".