168424717 has 2 divisors, whose sum is σ = 168424718. Its totient is φ = 168424716.

The previous prime is 168424687. The next prime is 168424723. The reversal of 168424717 is 717424861.

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., 155900196 + 12524521 = 12486^2 + 3539^2 .

It is an emirp because it is prime and its reverse (717424861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168424717 - 2⁷ = 168424589 is a prime.

It is a super-3 number, since 3×168424717³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168424717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168424727) 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, 84212358 + 84212359.

It is an arithmetic number, because the mean of its divisors is an integer number (84212359).

Almost surely, 2^168424717 is an apocalyptic number.

It is an amenable number.

168424717 is a deficient number, since it is larger than the sum of its proper divisors (1).

168424717 is an equidigital number, since it uses as much as digits as its factorization.

168424717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 40.

The square root of 168424717 is about 12977.8548689681. The cubic root of 168424717 is about 552.2494289067.

The spelling of 168424717 in words is "one hundred sixty-eight million, four hundred twenty-four thousand, seven hundred seventeen".