422310989 has 2 divisors, whose sum is σ = 422310990. Its totient is φ = 422310988.

The previous prime is 422310979. The next prime is 422311013. The reversal of 422310989 is 989013224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270602500 + 151708489 = 16450^2 + 12317^2 .

It is a cyclic number.

It is not a de Polignac number, because 422310989 - 2²⁴ = 405533773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422310979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211155494 + 211155495.

It is an arithmetic number, because the mean of its divisors is an integer number (211155495).

Almost surely, 2^422310989 is an apocalyptic number.

It is an amenable number.

422310989 is a deficient number, since it is larger than the sum of its proper divisors (1).

422310989 is an equidigital number, since it uses as much as digits as its factorization.

422310989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 422310989 is about 20550.2065439742. The cubic root of 422310989 is about 750.2582749004.

The spelling of 422310989 in words is "four hundred twenty-two million, three hundred ten thousand, nine hundred eighty-nine".