422442091 has 2 divisors, whose sum is σ = 422442092. Its totient is φ = 422442090.

The previous prime is 422442089. The next prime is 422442109. The reversal of 422442091 is 190244224.

Together with next prime (422442109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422442091 - 2¹ = 422442089 is a prime.

Together with 422442089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (422442001) 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, 211221045 + 211221046.

It is an arithmetic number, because the mean of its divisors is an integer number (211221046).

Almost surely, 2^422442091 is an apocalyptic number.

422442091 is a deficient number, since it is larger than the sum of its proper divisors (1).

422442091 is an equidigital number, since it uses as much as digits as its factorization.

422442091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 422442091 is about 20553.3960940765. The cubic root of 422442091 is about 750.3359034620.

The spelling of 422442091 in words is "four hundred twenty-two million, four hundred forty-two thousand, ninety-one".