422968921 has 2 divisors, whose sum is σ = 422968922. Its totient is φ = 422968920.

The previous prime is 422968907. The next prime is 422968999. The reversal of 422968921 is 129869224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271063296 + 151905625 = 16464^2 + 12325^2 .

It is a cyclic number.

It is not a de Polignac number, because 422968921 - 2⁹ = 422968409 is a prime.

It is not a weakly prime, because it can be changed into another prime (422968901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211484460 + 211484461.

It is an arithmetic number, because the mean of its divisors is an integer number (211484461).

Almost surely, 2^422968921 is an apocalyptic number.

It is an amenable number.

422968921 is a deficient number, since it is larger than the sum of its proper divisors (1).

422968921 is an equidigital number, since it uses as much as digits as its factorization.

422968921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 422968921 is about 20566.2082309793. The cubic root of 422968921 is about 750.6476899840.

The spelling of 422968921 in words is "four hundred twenty-two million, nine hundred sixty-eight thousand, nine hundred twenty-one".