23149989 has 8 divisors (see below), whose sum is σ = 34296320. Its totient is φ = 15433308.

The previous prime is 23149969. The next prime is 23150009. The reversal of 23149989 is 98994132.

It is an interprime number because it is at equal distance from previous prime (23149969) and next prime (23150009).

It is not a de Polignac number, because 23149989 - 2⁵ = 23149957 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 (23149909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428677 + ... + 428730.

It is an arithmetic number, because the mean of its divisors is an integer number (4287040).

Almost surely, 2^23149989 is an apocalyptic number.

It is an amenable number.

23149989 is a deficient number, since it is larger than the sum of its proper divisors (11146331).

23149989 is an equidigital number, since it uses as much as digits as its factorization.

23149989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857416 (or 857410 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 23149989 is about 4811.4435463798. The cubic root of 23149989 is about 285.0035456623.

The spelling of 23149989 in words is "twenty-three million, one hundred forty-nine thousand, nine hundred eighty-nine".