22968721 has 2 divisors, whose sum is σ = 22968722. Its totient is φ = 22968720.

The previous prime is 22968707. The next prime is 22968767. The reversal of 22968721 is 12786922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21492496 + 1476225 = 4636^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 22968721 - 2⁵ = 22968689 is a prime.

It is not a weakly prime, because it can be changed into another prime (22968791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11484360 + 11484361.

It is an arithmetic number, because the mean of its divisors is an integer number (11484361).

Almost surely, 2^22968721 is an apocalyptic number.

It is an amenable number.

22968721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22968721 is an equidigital number, since it uses as much as digits as its factorization.

22968721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 22968721 is about 4792.5693526542. The cubic root of 22968721 is about 284.2577216519.

The spelling of 22968721 in words is "twenty-two million, nine hundred sixty-eight thousand, seven hundred twenty-one".