23831239 has 2 divisors, whose sum is σ = 23831240. Its totient is φ = 23831238.

The previous prime is 23831233. The next prime is 23831257. The reversal of 23831239 is 93213832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23831239 - 2³ = 23831231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23831239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23831231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11915619 + 11915620.

It is an arithmetic number, because the mean of its divisors is an integer number (11915620).

Almost surely, 2^23831239 is an apocalyptic number.

23831239 is a deficient number, since it is larger than the sum of its proper divisors (1).

23831239 is an equidigital number, since it uses as much as digits as its factorization.

23831239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 23831239 is about 4881.7250024966. The cubic root of 23831239 is about 287.7722245775.

The spelling of 23831239 in words is "twenty-three million, eight hundred thirty-one thousand, two hundred thirty-nine".