23977431 has 16 divisors (see below), whose sum is σ = 37067520. Its totient is φ = 15289560.

The previous prime is 23977417. The next prime is 23977433. The reversal of 23977431 is 13477932.

It is not a de Polignac number, because 23977431 - 2⁵ = 23977399 is a prime.

It is a super-2 number, since 2×23977431² = 1149834394719522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23977433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18685 + ... + 19926.

It is an arithmetic number, because the mean of its divisors is an integer number (2316720).

Almost surely, 2^23977431 is an apocalyptic number.

23977431 is a deficient number, since it is larger than the sum of its proper divisors (13090089).

23977431 is a wasteful number, since it uses less digits than its factorization.

23977431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38643 (or 38637 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 23977431 is about 4896.6755048706. The cubic root of 23977431 is about 288.3594686754.

The spelling of 23977431 in words is "twenty-three million, nine hundred seventy-seven thousand, four hundred thirty-one".