23099979 has 32 divisors (see below), whose sum is σ = 36933120. Its totient is φ = 12563712.

The previous prime is 23099969. The next prime is 23100001. The reversal of 23099979 is 97999032.

It is a happy number.

It is not a de Polignac number, because 23099979 - 2⁴ = 23099963 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (23099939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50319 + ... + 50775.

It is an arithmetic number, because the mean of its divisors is an integer number (1154160).

Almost surely, 2^23099979 is an apocalyptic number.

23099979 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

23099979 is a deficient number, since it is larger than the sum of its proper divisors (13833141).

23099979 is a wasteful number, since it uses less digits than its factorization.

23099979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579.

The product of its (nonzero) digits is 275562, while the sum is 48.

The square root of 23099979 is about 4806.2437516214. The cubic root of 23099979 is about 284.7981704305.

The spelling of 23099979 in words is "twenty-three million, ninety-nine thousand, nine hundred seventy-nine".