22289909 has 2 divisors, whose sum is σ = 22289910. Its totient is φ = 22289908.

The previous prime is 22289903. The next prime is 22289923. The reversal of 22289909 is 90998222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 7963684 = 3785^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 22289909 - 2⁸ = 22289653 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 (22289903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144954 + 11144955.

It is an arithmetic number, because the mean of its divisors is an integer number (11144955).

Almost surely, 2^22289909 is an apocalyptic number.

It is an amenable number.

22289909 is a deficient number, since it is larger than the sum of its proper divisors (1).

22289909 is an equidigital number, since it uses as much as digits as its factorization.

22289909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 22289909 is about 4721.2190163135. The cubic root of 22289909 is about 281.4293786396.

The spelling of 22289909 in words is "twenty-two million, two hundred eighty-nine thousand, nine hundred nine".