23977989 has 24 divisors (see below), whose sum is σ = 40552512. Its totient is φ = 13366080.

The previous prime is 23977963. The next prime is 23977997. The reversal of 23977989 is 98977932.

It is not a de Polignac number, because 23977989 - 2⁵ = 23977957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23977909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2059 + ... + 7224.

It is an arithmetic number, because the mean of its divisors is an integer number (1689688).

Almost surely, 2^23977989 is an apocalyptic number.

It is an amenable number.

23977989 is a deficient number, since it is larger than the sum of its proper divisors (16574523).

23977989 is a wasteful number, since it uses less digits than its factorization.

23977989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9337 (or 9334 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 23977989 is about 4896.7324819720. The cubic root of 23977989 is about 288.3617055474.

The spelling of 23977989 in words is "twenty-three million, nine hundred seventy-seven thousand, nine hundred eighty-nine".