22809947 has 2 divisors, whose sum is σ = 22809948. Its totient is φ = 22809946.

The previous prime is 22809923. The next prime is 22809959. The reversal of 22809947 is 74990822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22809947 - 2⁶ = 22809883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22809047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11404973 + 11404974.

It is an arithmetic number, because the mean of its divisors is an integer number (11404974).

Almost surely, 2^22809947 is an apocalyptic number.

22809947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22809947 is an equidigital number, since it uses as much as digits as its factorization.

22809947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 22809947 is about 4775.9760259030. The cubic root of 22809947 is about 283.6012182293.

The spelling of 22809947 in words is "twenty-two million, eight hundred nine thousand, nine hundred forty-seven".