23979881 has 4 divisors (see below), whose sum is σ = 25242000. Its totient is φ = 22717764.

The previous prime is 23979847. The next prime is 23979883. The reversal of 23979881 is 18897932.

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 not a de Polignac number, because 23979881 - 2⁶ = 23979817 is a prime.

It is a super-2 number, since 2×23979881² = 1150069385548322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23979883) 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, 631031 + ... + 631068.

It is an arithmetic number, because the mean of its divisors is an integer number (6310500).

Almost surely, 2^23979881 is an apocalyptic number.

It is an amenable number.

23979881 is a deficient number, since it is larger than the sum of its proper divisors (1262119).

23979881 is a wasteful number, since it uses less digits than its factorization.

23979881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262118.

The product of its digits is 217728, while the sum is 47.

The square root of 23979881 is about 4896.9256682127. The cubic root of 23979881 is about 288.3692898087.

The spelling of 23979881 in words is "twenty-three million, nine hundred seventy-nine thousand, eight hundred eighty-one".