22399889 has 2 divisors, whose sum is σ = 22399890. Its totient is φ = 22399888.

The previous prime is 22399849. The next prime is 22399901. The reversal of 22399889 is 98899322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 2890000 = 4417^2 + 1700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22399889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22399849) 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, 11199944 + 11199945.

It is an arithmetic number, because the mean of its divisors is an integer number (11199945).

Almost surely, 2^22399889 is an apocalyptic number.

It is an amenable number.

22399889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22399889 is an equidigital number, since it uses as much as digits as its factorization.

22399889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 50.

The square root of 22399889 is about 4732.8520999499. The cubic root of 22399889 is about 281.8914836567.

The spelling of 22399889 in words is "twenty-two million, three hundred ninety-nine thousand, eight hundred eighty-nine".