422658989 has 2 divisors, whose sum is σ = 422658990. Its totient is φ = 422658988.

The previous prime is 422658959. The next prime is 422659007. The reversal of 422658989 is 989856224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373069225 + 49589764 = 19315^2 + 7042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422658989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 422658989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422658919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211329494 + 211329495.

It is an arithmetic number, because the mean of its divisors is an integer number (211329495).

Almost surely, 2^422658989 is an apocalyptic number.

It is an amenable number.

422658989 is a deficient number, since it is larger than the sum of its proper divisors (1).

422658989 is an equidigital number, since it uses as much as digits as its factorization.

422658989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 53.

The square root of 422658989 is about 20558.6718685814. The cubic root of 422658989 is about 750.4642985839.

The spelling of 422658989 in words is "four hundred twenty-two million, six hundred fifty-eight thousand, nine hundred eighty-nine".