422638877 has 2 divisors, whose sum is σ = 422638878. Its totient is φ = 422638876.

The previous prime is 422638849. The next prime is 422638891. The reversal of 422638877 is 778836224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261501241 + 161137636 = 16171^2 + 12694^2 .

It is a cyclic number.

It is not a de Polignac number, because 422638877 - 2⁸ = 422638621 is a prime.

It is a super-2 number, since 2×422638877² = 357247240703642258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422638817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211319438 + 211319439.

It is an arithmetic number, because the mean of its divisors is an integer number (211319439).

Almost surely, 2^422638877 is an apocalyptic number.

It is an amenable number.

422638877 is a deficient number, since it is larger than the sum of its proper divisors (1).

422638877 is an equidigital number, since it uses as much as digits as its factorization.

422638877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 47.

The square root of 422638877 is about 20558.1827261069. The cubic root of 422638877 is about 750.4523949154.

The spelling of 422638877 in words is "four hundred twenty-two million, six hundred thirty-eight thousand, eight hundred seventy-seven".