23239 has 4 divisors (see below), whose sum is σ = 24624. Its totient is φ = 21856.

The previous prime is 23227. The next prime is 23251. The reversal of 23239 is 93232.

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

It is an interprime number because it is at equal distance from previous prime (23227) and next prime (23251).

It is a cyclic number.

It is not a de Polignac number, because 23239 - 2⁹ = 22727 is a prime.

It is a super-2 number, since 2×23239² = 1080102242, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁷ + 3⁷ + 2⁹ + 3⁹ + 9³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23209) 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, 667 + ... + 700.

It is an arithmetic number, because the mean of its divisors is an integer number (6156).

2²³²³⁹ is an apocalyptic number.

23239 is a deficient number, since it is larger than the sum of its proper divisors (1385).

23239 is a wasteful number, since it uses less digits than its factorization.

23239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its digits is 324, while the sum is 19.

The square root of 23239 is about 152.4434321314. The cubic root of 23239 is about 28.5368355141.

Subtracting from 23239 its sum of digits (19), we obtain a triangular number (23220 = T₂₁₅).

It can be divided in two parts, 2323 and 9, that added together give a palindrome (2332).

The spelling of 23239 in words is "twenty-three thousand, two hundred thirty-nine".