24439 has 2 divisors, whose sum is σ = 24440.
Its totient is φ = 24438.
The previous prime is 24421. The next prime is 24443. The reversal of 24439 is 93442.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 24439 - 25 = 24407 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 (24419) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12219 + 12220.
It is an arithmetic number, because the mean of its divisors is an integer number (12220).
224439 is an apocalyptic number.
24439 is a deficient number, since it is larger than the sum of its proper divisors (1).
24439 is an equidigital number, since it uses as much as digits as its factorization.
24439 is an evil number, because the sum of its binary digits is even.
The product of its digits is 864, while the sum is 22.
The square root of 24439 is about 156.3297796327.
The cubic root of 24439 is about 29.0198041500.
The spelling of 24439 in words is "twenty-four thousand, four hundred thirty-nine".