172428304717 has 2 divisors, whose sum is σ = 172428304718. Its totient is φ = 172428304716.

The previous prime is 172428304703. The next prime is 172428304721. The reversal of 172428304717 is 717403824271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150005937636 + 22422367081 = 387306^2 + 149741^2 .

It is an emirp because it is prime and its reverse (717403824271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172428304717 - 2¹⁹ = 172427780429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172428304747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86214152358 + 86214152359.

It is an arithmetic number, because the mean of its divisors is an integer number (86214152359).

Almost surely, 2^172428304717 is an apocalyptic number.

It is an amenable number.

172428304717 is a deficient number, since it is larger than the sum of its proper divisors (1).

172428304717 is an equidigital number, since it uses as much as digits as its factorization.

172428304717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 172428304717 in words is "one hundred seventy-two billion, four hundred twenty-eight million, three hundred four thousand, seven hundred seventeen".