22905009 has 6 divisors (see below), whose sum is σ = 33085026. Its totient is φ = 15270000.

The previous prime is 22904989. The next prime is 22905011. The reversal of 22905009 is 90050922.

It can be written as a sum of positive squares in only one way, i.e., 18792225 + 4112784 = 4335^2 + 2028^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22905009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22905049) 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 in 5 ways as a sum of consecutive naturals, for example, 1272492 + ... + 1272509.

It is an arithmetic number, because the mean of its divisors is an integer number (5514171).

Almost surely, 2^22905009 is an apocalyptic number.

It is an amenable number.

22905009 is a deficient number, since it is larger than the sum of its proper divisors (10180017).

22905009 is a wasteful number, since it uses less digits than its factorization.

22905009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545007 (or 2545004 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 22905009 is about 4785.9177803218. The cubic root of 22905009 is about 283.9946479518.

The spelling of 22905009 in words is "twenty-two million, nine hundred five thousand, nine".