422847209 has 2 divisors, whose sum is σ = 422847210. Its totient is φ = 422847208.

The previous prime is 422847199. The next prime is 422847253. The reversal of 422847209 is 902748224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238023184 + 184824025 = 15428^2 + 13595^2 .

It is a cyclic number.

It is not a de Polignac number, because 422847209 - 2⁴ = 422847193 is a prime.

It is not a weakly prime, because it can be changed into another prime (422867209) 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, 211423604 + 211423605.

It is an arithmetic number, because the mean of its divisors is an integer number (211423605).

Almost surely, 2^422847209 is an apocalyptic number.

It is an amenable number.

422847209 is a deficient number, since it is larger than the sum of its proper divisors (1).

422847209 is an equidigital number, since it uses as much as digits as its factorization.

422847209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 422847209 is about 20563.2489893985. The cubic root of 422847209 is about 750.5756818593.

The spelling of 422847209 in words is "four hundred twenty-two million, eight hundred forty-seven thousand, two hundred nine".