23239439 has 2 divisors, whose sum is σ = 23239440. Its totient is φ = 23239438.

The previous prime is 23239427. The next prime is 23239481. The reversal of 23239439 is 93493232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23239439 - 2⁴ = 23239423 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23239399 and 23239408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23239409) 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, 11619719 + 11619720.

It is an arithmetic number, because the mean of its divisors is an integer number (11619720).

Almost surely, 2^23239439 is an apocalyptic number.

23239439 is a deficient number, since it is larger than the sum of its proper divisors (1).

23239439 is an equidigital number, since it uses as much as digits as its factorization.

23239439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 23239439 is about 4820.7301314220. The cubic root of 23239439 is about 285.3701520614.

The spelling of 23239439 in words is "twenty-three million, two hundred thirty-nine thousand, four hundred thirty-nine".