22897909 has 2 divisors, whose sum is σ = 22897910. Its totient is φ = 22897908.

The previous prime is 22897891. The next prime is 22897943. The reversal of 22897909 is 90979822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22297284 + 600625 = 4722^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 22897909 - 2⁵ = 22897877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22897969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11448954 + 11448955.

It is an arithmetic number, because the mean of its divisors is an integer number (11448955).

Almost surely, 2^22897909 is an apocalyptic number.

It is an amenable number.

22897909 is a deficient number, since it is larger than the sum of its proper divisors (1).

22897909 is an equidigital number, since it uses as much as digits as its factorization.

22897909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 22897909 is about 4785.1759633267. The cubic root of 22897909 is about 283.9653010903.

The spelling of 22897909 in words is "twenty-two million, eight hundred ninety-seven thousand, nine hundred nine".