168159917 has 2 divisors, whose sum is σ = 168159918. Its totient is φ = 168159916.

The previous prime is 168159881. The next prime is 168159947. The reversal of 168159917 is 719951861.

168159917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167598916 + 561001 = 12946^2 + 749^2 .

It is an emirp because it is prime and its reverse (719951861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168159917 - 2¹⁴ = 168143533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168159947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84079958 + 84079959.

It is an arithmetic number, because the mean of its divisors is an integer number (84079959).

Almost surely, 2^168159917 is an apocalyptic number.

It is an amenable number.

168159917 is a deficient number, since it is larger than the sum of its proper divisors (1).

168159917 is an equidigital number, since it uses as much as digits as its factorization.

168159917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 47.

The square root of 168159917 is about 12967.6488616865. The cubic root of 168159917 is about 551.9598586735.

The spelling of 168159917 in words is "one hundred sixty-eight million, one hundred fifty-nine thousand, nine hundred seventeen".