472219717 has 2 divisors, whose sum is σ = 472219718. Its totient is φ = 472219716.

The previous prime is 472219663. The next prime is 472219723. The reversal of 472219717 is 717912274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421439841 + 50779876 = 20529^2 + 7126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-472219717 is a prime.

It is a super-2 number, since 2×472219717² = 445982922247120178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 472219717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472219747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236109858 + 236109859.

It is an arithmetic number, because the mean of its divisors is an integer number (236109859).

Almost surely, 2^472219717 is an apocalyptic number.

It is an amenable number.

472219717 is a deficient number, since it is larger than the sum of its proper divisors (1).

472219717 is an equidigital number, since it uses as much as digits as its factorization.

472219717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 472219717 is about 21730.6170414004. The cubic root of 472219717 is about 778.7200776385.

The spelling of 472219717 in words is "four hundred seventy-two million, two hundred nineteen thousand, seven hundred seventeen".