22909009 has 2 divisors, whose sum is σ = 22909010. Its totient is φ = 22909008.

The previous prime is 22909001. The next prime is 22909027. The reversal of 22909009 is 90090922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22353984 + 555025 = 4728^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 22909009 - 2³ = 22909001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22909001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11454504 + 11454505.

It is an arithmetic number, because the mean of its divisors is an integer number (11454505).

Almost surely, 2^22909009 is an apocalyptic number.

It is an amenable number.

22909009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22909009 is an equidigital number, since it uses as much as digits as its factorization.

22909009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 22909009 is about 4786.3356547572. The cubic root of 22909009 is about 284.0111787242.

The spelling of 22909009 in words is "twenty-two million, nine hundred nine thousand, nine".