157472397 has 16 divisors (see below), whose sum is σ = 234329280. Its totient is φ = 104515056.

The previous prime is 157472389. The next prime is 157472401. The reversal of 157472397 is 793274751.

157472397 is a `hidden beast` number, since 1 + 574 + 72 + 3 + 9 + 7 = 666.

157472397 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 157472397 - 2³ = 157472389 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157472317) 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, 6718 + ... + 18975.

It is an arithmetic number, because the mean of its divisors is an integer number (14645580).

Almost surely, 2^157472397 is an apocalyptic number.

It is an amenable number.

157472397 is a deficient number, since it is larger than the sum of its proper divisors (76856883).

157472397 is a wasteful number, since it uses less digits than its factorization.

157472397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25929 (or 25923 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 157472397 is about 12548.8006199796. The cubic root of 157472397 is about 540.0095985948.

The spelling of 157472397 in words is "one hundred fifty-seven million, four hundred seventy-two thousand, three hundred ninety-seven".