422756991 has 12 divisors (see below), whose sum is σ = 622171368. Its totient is φ = 276519984.

The previous prime is 422756941. The next prime is 422757029. The reversal of 422756991 is 199657224.

It is not a de Polignac number, because 422756991 - 2⁶ = 422756927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422756911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442665 + ... + 443618.

It is an arithmetic number, because the mean of its divisors is an integer number (51847614).

Almost surely, 2^422756991 is an apocalyptic number.

422756991 is a deficient number, since it is larger than the sum of its proper divisors (199414377).

422756991 is a wasteful number, since it uses less digits than its factorization.

422756991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886342 (or 886339 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 422756991 is about 20561.0552015212. The cubic root of 422756991 is about 750.5222975226.

The spelling of 422756991 in words is "four hundred twenty-two million, seven hundred fifty-six thousand, nine hundred ninety-one".