23117279 has 4 divisors (see below), whose sum is σ = 23609184. Its totient is φ = 22625376.

The previous prime is 23117261. The next prime is 23117287. The reversal of 23117279 is 97271132.

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

It is a cyclic number.

It is not a de Polignac number, because 23117279 - 2⁸ = 23117023 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 (23117209) 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, 245882 + ... + 245975.

It is an arithmetic number, because the mean of its divisors is an integer number (5902296).

Almost surely, 2^23117279 is an apocalyptic number.

23117279 is a deficient number, since it is larger than the sum of its proper divisors (491905).

23117279 is an equidigital number, since it uses as much as digits as its factorization.

23117279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491904.

The product of its digits is 5292, while the sum is 32.

The square root of 23117279 is about 4808.0431570442. The cubic root of 23117279 is about 284.8692495555.

The spelling of 23117279 in words is "twenty-three million, one hundred seventeen thousand, two hundred seventy-nine".