23715989 has 4 divisors (see below), whose sum is σ = 25872000. Its totient is φ = 21559980.

The previous prime is 23715983. The next prime is 23716031. The reversal of 23715989 is 98951732.

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 23715989 - 2⁸ = 23715733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23715983) 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, 1077989 + ... + 1078010.

It is an arithmetic number, because the mean of its divisors is an integer number (6468000).

Almost surely, 2^23715989 is an apocalyptic number.

It is an amenable number.

23715989 is a deficient number, since it is larger than the sum of its proper divisors (2156011).

23715989 is a wasteful number, since it uses less digits than its factorization.

23715989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156010.

The product of its digits is 136080, while the sum is 44.

The square root of 23715989 is about 4869.9064672743. The cubic root of 23715989 is about 287.3075773532.

The spelling of 23715989 in words is "twenty-three million, seven hundred fifteen thousand, nine hundred eighty-nine".