422420239 has 2 divisors, whose sum is σ = 422420240. Its totient is φ = 422420238.

The previous prime is 422420237. The next prime is 422420249. The reversal of 422420239 is 932024224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422420239 - 2¹ = 422420237 is a prime.

Together with 422420237, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422420237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211210119 + 211210120.

It is an arithmetic number, because the mean of its divisors is an integer number (211210120).

Almost surely, 2^422420239 is an apocalyptic number.

422420239 is a deficient number, since it is larger than the sum of its proper divisors (1).

422420239 is an equidigital number, since it uses as much as digits as its factorization.

422420239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 422420239 is about 20552.8644962205. The cubic root of 422420239 is about 750.3229654970.

The spelling of 422420239 in words is "four hundred twenty-two million, four hundred twenty thousand, two hundred thirty-nine".