23205239 has 2 divisors, whose sum is σ = 23205240. Its totient is φ = 23205238.

The previous prime is 23205233. The next prime is 23205269. The reversal of 23205239 is 93250232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23205239 - 2²⁰ = 22156663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23205233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11602619 + 11602620.

It is an arithmetic number, because the mean of its divisors is an integer number (11602620).

Almost surely, 2^23205239 is an apocalyptic number.

23205239 is a deficient number, since it is larger than the sum of its proper divisors (1).

23205239 is an equidigital number, since it uses as much as digits as its factorization.

23205239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 23205239 is about 4817.1816449040. The cubic root of 23205239 is about 285.2300963186.

The spelling of 23205239 in words is "twenty-three million, two hundred five thousand, two hundred thirty-nine".