23157923 has 4 divisors (see below), whose sum is σ = 23174928. Its totient is φ = 23140920.

The previous prime is 23157853. The next prime is 23157943. The reversal of 23157923 is 32975132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23157923 - 2¹⁰ = 23156899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23157923.

It is not an unprimeable number, because it can be changed into a prime (23157943) 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, 6263 + ... + 9248.

It is an arithmetic number, because the mean of its divisors is an integer number (5793732).

Almost surely, 2^23157923 is an apocalyptic number.

23157923 is a deficient number, since it is larger than the sum of its proper divisors (17005).

23157923 is a wasteful number, since it uses less digits than its factorization.

23157923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17004.

The product of its digits is 11340, while the sum is 32.

The square root of 23157923 is about 4812.2679684323. The cubic root of 23157923 is about 285.0361008953.

The spelling of 23157923 in words is "twenty-three million, one hundred fifty-seven thousand, nine hundred twenty-three".