422604209 has 2 divisors, whose sum is σ = 422604210. Its totient is φ = 422604208.

The previous prime is 422604199. The next prime is 422604223. The reversal of 422604209 is 902406224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409171984 + 13432225 = 20228^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 422604209 - 2²⁰ = 421555633 is a prime.

It is not a weakly prime, because it can be changed into another prime (422604229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211302104 + 211302105.

It is an arithmetic number, because the mean of its divisors is an integer number (211302105).

Almost surely, 2^422604209 is an apocalyptic number.

It is an amenable number.

422604209 is a deficient number, since it is larger than the sum of its proper divisors (1).

422604209 is an equidigital number, since it uses as much as digits as its factorization.

422604209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 422604209 is about 20557.3395409036. The cubic root of 422604209 is about 750.4318751160.

The spelling of 422604209 in words is "four hundred twenty-two million, six hundred four thousand, two hundred nine".