23108989 has 4 divisors (see below), whose sum is σ = 23347324. Its totient is φ = 22870656.

The previous prime is 23108971. The next prime is 23109019. The reversal of 23108989 is 98980132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12020089 + 11088900 = 3467^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 23108989 - 2⁵ = 23108957 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 (23108489) 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, 119022 + ... + 119215.

It is an arithmetic number, because the mean of its divisors is an integer number (5836831).

Almost surely, 2^23108989 is an apocalyptic number.

It is an amenable number.

23108989 is a deficient number, since it is larger than the sum of its proper divisors (238335).

23108989 is an equidigital number, since it uses as much as digits as its factorization.

23108989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238334.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 23108989 is about 4807.1809826550. The cubic root of 23108989 is about 284.8351935228.

The spelling of 23108989 in words is "twenty-three million, one hundred eight thousand, nine hundred eighty-nine".