23158989 has 12 divisors (see below), whose sum is σ = 38230816. Its totient is φ = 13233672.

The previous prime is 23158987. The next prime is 23159009. The reversal of 23158989 is 98985132.

It is a happy number.

It is not a de Polignac number, because 23158989 - 2¹ = 23158987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23158987) 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 11 ways as a sum of consecutive naturals, for example, 183739 + ... + 183864.

Almost surely, 2^23158989 is an apocalyptic number.

It is an amenable number.

23158989 is a deficient number, since it is larger than the sum of its proper divisors (15071827).

23158989 is a wasteful number, since it uses less digits than its factorization.

23158989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367616 (or 367613 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 23158989 is about 4812.3787257447. The cubic root of 23158989 is about 285.0404743995.

The spelling of 23158989 in words is "twenty-three million, one hundred fifty-eight thousand, nine hundred eighty-nine".