168717427189 has 2 divisors, whose sum is σ = 168717427190. Its totient is φ = 168717427188.

The previous prime is 168717427169. The next prime is 168717427213. The reversal of 168717427189 is 981724717861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152685562500 + 16031864689 = 390750^2 + 126617^2 .

It is a cyclic number.

It is not a de Polignac number, because 168717427189 - 2⁹ = 168717426677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168717427169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84358713594 + 84358713595.

It is an arithmetic number, because the mean of its divisors is an integer number (84358713595).

Almost surely, 2^168717427189 is an apocalyptic number.

It is an amenable number.

168717427189 is a deficient number, since it is larger than the sum of its proper divisors (1).

168717427189 is an equidigital number, since it uses as much as digits as its factorization.

168717427189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9483264, while the sum is 61.

The spelling of 168717427189 in words is "one hundred sixty-eight billion, seven hundred seventeen million, four hundred twenty-seven thousand, one hundred eighty-nine".