422642947 has 2 divisors, whose sum is σ = 422642948. Its totient is φ = 422642946.

The previous prime is 422642929. The next prime is 422642951. The reversal of 422642947 is 749246224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 422642947 - 2⁷ = 422642819 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422642347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211321473 + 211321474.

It is an arithmetic number, because the mean of its divisors is an integer number (211321474).

Almost surely, 2^422642947 is an apocalyptic number.

422642947 is a deficient number, since it is larger than the sum of its proper divisors (1).

422642947 is an equidigital number, since it uses as much as digits as its factorization.

422642947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 40.

The square root of 422642947 is about 20558.2817132172. The cubic root of 422642947 is about 750.4548038526.

The spelling of 422642947 in words is "four hundred twenty-two million, six hundred forty-two thousand, nine hundred forty-seven".