422394209 has 2 divisors, whose sum is σ = 422394210. Its totient is φ = 422394208.

The previous prime is 422394199. The next prime is 422394211. The reversal of 422394209 is 902493224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350737984 + 71656225 = 18728^2 + 8465^2 .

It is a cyclic number.

It is not a de Polignac number, because 422394209 - 2⁸ = 422393953 is a prime.

Together with 422394211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422394229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211197104 + 211197105.

It is an arithmetic number, because the mean of its divisors is an integer number (211197105).

Almost surely, 2^422394209 is an apocalyptic number.

It is an amenable number.

422394209 is a deficient number, since it is larger than the sum of its proper divisors (1).

422394209 is an equidigital number, since it uses as much as digits as its factorization.

422394209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 422394209 is about 20552.2312414005. The cubic root of 422394209 is about 750.3075532715.

The spelling of 422394209 in words is "four hundred twenty-two million, three hundred ninety-four thousand, two hundred nine".