422450891 has 2 divisors, whose sum is σ = 422450892. Its totient is φ = 422450890.

The previous prime is 422450881. The next prime is 422450911. The reversal of 422450891 is 198054224.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422450891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422450881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211225445 + 211225446.

It is an arithmetic number, because the mean of its divisors is an integer number (211225446).

Almost surely, 2^422450891 is an apocalyptic number.

422450891 is a deficient number, since it is larger than the sum of its proper divisors (1).

422450891 is an equidigital number, since it uses as much as digits as its factorization.

422450891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 422450891 is about 20553.6101695055. The cubic root of 422450891 is about 750.3411135726.

The spelling of 422450891 in words is "four hundred twenty-two million, four hundred fifty thousand, eight hundred ninety-one".