22239439 has 2 divisors, whose sum is σ = 22239440. Its totient is φ = 22239438.

The previous prime is 22239421. The next prime is 22239461. The reversal of 22239439 is 93493222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22239439 - 2⁵ = 22239407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22231439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11119719 + 11119720.

It is an arithmetic number, because the mean of its divisors is an integer number (11119720).

Almost surely, 2^22239439 is an apocalyptic number.

22239439 is a deficient number, since it is larger than the sum of its proper divisors (1).

22239439 is an equidigital number, since it uses as much as digits as its factorization.

22239439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 22239439 is about 4715.8709693969. The cubic root of 22239439 is about 281.2168089886.

The spelling of 22239439 in words is "twenty-two million, two hundred thirty-nine thousand, four hundred thirty-nine".