422031989 has 2 divisors, whose sum is σ = 422031990. Its totient is φ = 422031988.

The previous prime is 422031959. The next prime is 422032003. The reversal of 422031989 is 989130224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250683889 + 171348100 = 15833^2 + 13090^2 .

It is a cyclic number.

It is not a de Polignac number, because 422031989 - 2²⁰ = 420983413 is a prime.

It is a super-2 number, since 2×422031989² = 356221999478592242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422031949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211015994 + 211015995.

It is an arithmetic number, because the mean of its divisors is an integer number (211015995).

Almost surely, 2^422031989 is an apocalyptic number.

It is an amenable number.

422031989 is a deficient number, since it is larger than the sum of its proper divisors (1).

422031989 is an equidigital number, since it uses as much as digits as its factorization.

422031989 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 422031989 is about 20543.4171694974. The cubic root of 422031989 is about 750.0930189813.

The spelling of 422031989 in words is "four hundred twenty-two million, thirty-one thousand, nine hundred eighty-nine".