422808921 has 12 divisors (see below), whose sum is σ = 646649172. Its totient is φ = 265291776.

The previous prime is 422808917. The next prime is 422808937. The reversal of 422808921 is 129808224.

It can be written as a sum of positive squares in 2 ways, for example, as 139358025 + 283450896 = 11805^2 + 16836^2 .

It is not a de Polignac number, because 422808921 - 2² = 422808917 is a prime.

It is a super-3 number, since 3×422808921³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (422808901) 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, 1381576 + ... + 1381881.

It is an arithmetic number, because the mean of its divisors is an integer number (53887431).

Almost surely, 2^422808921 is an apocalyptic number.

It is an amenable number.

422808921 is a deficient number, since it is larger than the sum of its proper divisors (223840251).

422808921 is a wasteful number, since it uses less digits than its factorization.

422808921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763480 (or 2763477 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 422808921 is about 20562.3179870364. The cubic root of 422808921 is about 750.5530267816.

The spelling of 422808921 in words is "four hundred twenty-two million, eight hundred eight thousand, nine hundred twenty-one".