22909949 has 2 divisors, whose sum is σ = 22909950. Its totient is φ = 22909948.

The previous prime is 22909891. The next prime is 22909969. The reversal of 22909949 is 94990922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22629049 + 280900 = 4757^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 22909949 - 2²⁰ = 21861373 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22909969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11454974 + 11454975.

It is an arithmetic number, because the mean of its divisors is an integer number (11454975).

Almost surely, 2^22909949 is an apocalyptic number.

It is an amenable number.

22909949 is a deficient number, since it is larger than the sum of its proper divisors (1).

22909949 is an equidigital number, since it uses as much as digits as its factorization.

22909949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 22909949 is about 4786.4338499555. The cubic root of 22909949 is about 284.0150631764.

The spelling of 22909949 in words is "twenty-two million, nine hundred nine thousand, nine hundred forty-nine".