22439929 has 2 divisors, whose sum is σ = 22439930. Its totient is φ = 22439928.

The previous prime is 22439903. The next prime is 22439941. The reversal of 22439929 is 92993422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20684304 + 1755625 = 4548^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 22439929 - 2⁵ = 22439897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22439891 and 22439900.

It is not a weakly prime, because it can be changed into another prime (22439999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11219964 + 11219965.

It is an arithmetic number, because the mean of its divisors is an integer number (11219965).

Almost surely, 2^22439929 is an apocalyptic number.

It is an amenable number.

22439929 is a deficient number, since it is larger than the sum of its proper divisors (1).

22439929 is an equidigital number, since it uses as much as digits as its factorization.

22439929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 22439929 is about 4737.0802188690. The cubic root of 22439929 is about 282.0593448533.

The spelling of 22439929 in words is "twenty-two million, four hundred thirty-nine thousand, nine hundred twenty-nine".