23839 has 4 divisors (see below), whose sum is σ = 24640. Its totient is φ = 23040.

The previous prime is 23833. The next prime is 23857. The reversal of 23839 is 93832.

It is a happy number.

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 23839 - 2³ = 23831 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 (23831) 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, 354 + ... + 415.

It is an arithmetic number, because the mean of its divisors is an integer number (6160).

2²³⁸³⁹ is an apocalyptic number.

23839 is a deficient number, since it is larger than the sum of its proper divisors (801).

23839 is an equidigital number, since it uses as much as digits as its factorization.

23839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its digits is 1296, while the sum is 25.

The square root of 23839 is about 154.3988341925. The cubic root of 23839 is about 28.7803460299.

The spelling of 23839 in words is "twenty-three thousand, eight hundred thirty-nine".