168457217 has 2 divisors, whose sum is σ = 168457218. Its totient is φ = 168457216.

The previous prime is 168457207. The next prime is 168457231. The reversal of 168457217 is 712754861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93876721 + 74580496 = 9689^2 + 8636^2 .

It is a cyclic number.

It is not a de Polignac number, because 168457217 - 2¹⁰ = 168456193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168457207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84228608 + 84228609.

It is an arithmetic number, because the mean of its divisors is an integer number (84228609).

Almost surely, 2^168457217 is an apocalyptic number.

It is an amenable number.

168457217 is a deficient number, since it is larger than the sum of its proper divisors (1).

168457217 is an equidigital number, since it uses as much as digits as its factorization.

168457217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 168457217 is about 12979.1069415426. The cubic root of 168457217 is about 552.2849481433.

The spelling of 168457217 in words is "one hundred sixty-eight million, four hundred fifty-seven thousand, two hundred seventeen".