23165989 has 8 divisors (see below), whose sum is σ = 28882368. Its totient is φ = 18051360.

The previous prime is 23165981. The next prime is 23165993. The reversal of 23165989 is 98956132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23165989 - 2³ = 23165981 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 (23165981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150352 + ... + 150505.

It is an arithmetic number, because the mean of its divisors is an integer number (3610296).

Almost surely, 2^23165989 is an apocalyptic number.

It is an amenable number.

23165989 is a deficient number, since it is larger than the sum of its proper divisors (5716379).

23165989 is a wasteful number, since it uses less digits than its factorization.

23165989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300875.

The product of its digits is 116640, while the sum is 43.

The square root of 23165989 is about 4813.1059618504. The cubic root of 23165989 is about 285.0691901367.

The spelling of 23165989 in words is "twenty-three million, one hundred sixty-five thousand, nine hundred eighty-nine".