422437921 has 2 divisors, whose sum is σ = 422437922. Its totient is φ = 422437920.

The previous prime is 422437909. The next prime is 422437937. The reversal of 422437921 is 129734224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261274896 + 161163025 = 16164^2 + 12695^2 .

It is a cyclic number.

It is not a de Polignac number, because 422437921 - 2⁹ = 422437409 is a prime.

It is not a weakly prime, because it can be changed into another prime (422437901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211218960 + 211218961.

It is an arithmetic number, because the mean of its divisors is an integer number (211218961).

Almost surely, 2^422437921 is an apocalyptic number.

It is an amenable number.

422437921 is a deficient number, since it is larger than the sum of its proper divisors (1).

422437921 is an equidigital number, since it uses as much as digits as its factorization.

422437921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 422437921 is about 20553.2946507367. The cubic root of 422437921 is about 750.3334345547. Note that the first 3 decimals are identical.

The spelling of 422437921 in words is "four hundred twenty-two million, four hundred thirty-seven thousand, nine hundred twenty-one".