23979681 has 36 divisors (see below), whose sum is σ = 38980656. Its totient is φ = 14086800.

The previous prime is 23979677. The next prime is 23979689. The reversal of 23979681 is 18697932.

It is not a de Polignac number, because 23979681 - 2² = 23979677 is a prime.

It is a super-2 number, since 2×23979681² = 1150050201723522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23979689) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 182986 + ... + 183116.

It is an arithmetic number, because the mean of its divisors is an integer number (1082796).

Almost surely, 2^23979681 is an apocalyptic number.

It is an amenable number.

23979681 is a deficient number, since it is larger than the sum of its proper divisors (15000975).

23979681 is a wasteful number, since it uses less digits than its factorization.

23979681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 188 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 23979681 is about 4896.9052471944. The cubic root of 23979681 is about 288.3684881086.

The spelling of 23979681 in words is "twenty-three million, nine hundred seventy-nine thousand, six hundred eighty-one".