23691157 has 12 divisors (see below), whose sum is σ = 29010720. Its totient is φ = 19237176.

The previous prime is 23691113. The next prime is 23691163. The reversal of 23691157 is 75119632.

It is not a de Polignac number, because 23691157 - 2⁷ = 23691029 is a prime.

It is a super-2 number, since 2×23691157² = 1122541839997298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23691257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11793 + ... + 13654.

It is an arithmetic number, because the mean of its divisors is an integer number (2417560).

Almost surely, 2^23691157 is an apocalyptic number.

It is an amenable number.

23691157 is a deficient number, since it is larger than the sum of its proper divisors (5319563).

23691157 is a wasteful number, since it uses less digits than its factorization.

23691157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25480 (or 25473 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 23691157 is about 4867.3562639281. The cubic root of 23691157 is about 287.2072665001.

The spelling of 23691157 in words is "twenty-three million, six hundred ninety-one thousand, one hundred fifty-seven".