157845697 has 8 divisors (see below), whose sum is σ = 167567400. Its totient is φ = 148172544.

The previous prime is 157845691. The next prime is 157845739. The reversal of 157845697 is 796548751.

It can be written as a sum of positive squares in 4 ways, for example, as 43441281 + 114404416 = 6591^2 + 10696^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157845697 - 2³ = 157845689 is a prime.

It is a super-2 number, since 2×157845697² = 49830528122831618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157845691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5322 + ... + 18547.

It is an arithmetic number, because the mean of its divisors is an integer number (20945925).

Almost surely, 2^157845697 is an apocalyptic number.

157845697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

157845697 is a deficient number, since it is larger than the sum of its proper divisors (9721703).

157845697 is a wasteful number, since it uses less digits than its factorization.

157845697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24275.

The product of its digits is 2116800, while the sum is 52.

The square root of 157845697 is about 12563.6657469068. The cubic root of 157845697 is about 540.4359727938.

The spelling of 157845697 in words is "one hundred fifty-seven million, eight hundred forty-five thousand, six hundred ninety-seven".