23157969 has 4 divisors (see below), whose sum is σ = 30877296. Its totient is φ = 15438644.

The previous prime is 23157949. The next prime is 23157983. The reversal of 23157969 is 96975132.

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 a de Polignac number, because none of the positive numbers 2^k-23157969 is a prime.

It is a super-2 number, since 2×23157969² = 1072583056409922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23157969.

It is not an unprimeable number, because it can be changed into a prime (23157949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3859659 + ... + 3859664.

It is an arithmetic number, because the mean of its divisors is an integer number (7719324).

Almost surely, 2^23157969 is an apocalyptic number.

It is an amenable number.

23157969 is a deficient number, since it is larger than the sum of its proper divisors (7719327).

23157969 is an equidigital number, since it uses as much as digits as its factorization.

23157969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7719326.

The product of its digits is 102060, while the sum is 42.

The square root of 23157969 is about 4812.2727478812. The cubic root of 23157969 is about 285.0362896234.

The spelling of 23157969 in words is "twenty-three million, one hundred fifty-seven thousand, nine hundred sixty-nine".