23189979 has 4 divisors (see below), whose sum is σ = 30919976. Its totient is φ = 15459984.

The previous prime is 23189923. The next prime is 23190017. The reversal of 23189979 is 97998132.

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

It is not a de Polignac number, because 23189979 - 2⁷ = 23189851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23189279) 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, 3864994 + ... + 3864999.

It is an arithmetic number, because the mean of its divisors is an integer number (7729994).

Almost surely, 2^23189979 is an apocalyptic number.

23189979 is a deficient number, since it is larger than the sum of its proper divisors (7729997).

23189979 is an equidigital number, since it uses as much as digits as its factorization.

23189979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7729996.

The product of its digits is 244944, while the sum is 48.

The square root of 23189979 is about 4815.5974707195. The cubic root of 23189979 is about 285.1675592089.

The spelling of 23189979 in words is "twenty-three million, one hundred eighty-nine thousand, nine hundred seventy-nine".