23117959 has 4 divisors (see below), whose sum is σ = 23915160. Its totient is φ = 22320760.

The previous prime is 23117953. The next prime is 23117981. The reversal of 23117959 is 95971132.

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 23117959 - 2⁹ = 23117447 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 (23117953) 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, 398557 + ... + 398614.

It is an arithmetic number, because the mean of its divisors is an integer number (5978790).

Almost surely, 2^23117959 is an apocalyptic number.

23117959 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

23117959 is a deficient number, since it is larger than the sum of its proper divisors (797201).

23117959 is an equidigital number, since it uses as much as digits as its factorization.

23117959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797200.

The product of its digits is 17010, while the sum is 37.

The square root of 23117959 is about 4808.1138713637. The cubic root of 23117959 is about 284.8720426926.

The spelling of 23117959 in words is "twenty-three million, one hundred seventeen thousand, nine hundred fifty-nine".