168652217 has 2 divisors, whose sum is σ = 168652218. Its totient is φ = 168652216.

The previous prime is 168652213. The next prime is 168652247. The reversal of 168652217 is 712256861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162205696 + 6446521 = 12736^2 + 2539^2 .

It is an emirp because it is prime and its reverse (712256861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168652217 - 2² = 168652213 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168652213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84326108 + 84326109.

It is an arithmetic number, because the mean of its divisors is an integer number (84326109).

Almost surely, 2^168652217 is an apocalyptic number.

It is an amenable number.

168652217 is a deficient number, since it is larger than the sum of its proper divisors (1).

168652217 is an equidigital number, since it uses as much as digits as its factorization.

168652217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 168652217 is about 12986.6168419647. The cubic root of 168652217 is about 552.4979676836.

The spelling of 168652217 in words is "one hundred sixty-eight million, six hundred fifty-two thousand, two hundred seventeen".