422872717 has 2 divisors, whose sum is σ = 422872718. Its totient is φ = 422872716.

The previous prime is 422872669. The next prime is 422872753. The reversal of 422872717 is 717278224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 405055876 + 17816841 = 20126^2 + 4221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422872717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 422872717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422872777) 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, 211436358 + 211436359.

It is an arithmetic number, because the mean of its divisors is an integer number (211436359).

Almost surely, 2^422872717 is an apocalyptic number.

It is an amenable number.

422872717 is a deficient number, since it is larger than the sum of its proper divisors (1).

422872717 is an equidigital number, since it uses as much as digits as its factorization.

422872717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 40.

The square root of 422872717 is about 20563.8692127722. The cubic root of 422872717 is about 750.5907742293.

The spelling of 422872717 in words is "four hundred twenty-two million, eight hundred seventy-two thousand, seven hundred seventeen".