422654989 has 2 divisors, whose sum is σ = 422654990. Its totient is φ = 422654988.

The previous prime is 422654983. The next prime is 422654993. The reversal of 422654989 is 989456224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417998025 + 4656964 = 20445^2 + 2158^2 .

It is a cyclic number.

It is not a de Polignac number, because 422654989 - 2⁵ = 422654957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422654983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211327494 + 211327495.

It is an arithmetic number, because the mean of its divisors is an integer number (211327495).

Almost surely, 2^422654989 is an apocalyptic number.

It is an amenable number.

422654989 is a deficient number, since it is larger than the sum of its proper divisors (1).

422654989 is an equidigital number, since it uses as much as digits as its factorization.

422654989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The square root of 422654989 is about 20558.5745858024. The cubic root of 422654989 is about 750.4619311381.

The spelling of 422654989 in words is "four hundred twenty-two million, six hundred fifty-four thousand, nine hundred eighty-nine".