168517429 has 2 divisors, whose sum is σ = 168517430. Its totient is φ = 168517428.

The previous prime is 168517411. The next prime is 168517451. The reversal of 168517429 is 924715861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164608900 + 3908529 = 12830^2 + 1977^2 .

It is an emirp because it is prime and its reverse (924715861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168517429 - 2⁹ = 168516917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168514429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84258714 + 84258715.

It is an arithmetic number, because the mean of its divisors is an integer number (84258715).

Almost surely, 2^168517429 is an apocalyptic number.

It is an amenable number.

168517429 is a deficient number, since it is larger than the sum of its proper divisors (1).

168517429 is an equidigital number, since it uses as much as digits as its factorization.

168517429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 168517429 is about 12981.4263083838. The cubic root of 168517429 is about 552.3507417429.

The spelling of 168517429 in words is "one hundred sixty-eight million, five hundred seventeen thousand, four hundred twenty-nine".