168917113 has 4 divisors (see below), whose sum is σ = 171686308. Its totient is φ = 166147920.

The previous prime is 168917081. The next prime is 168917149. The reversal of 168917113 is 311719861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91336249 + 77580864 = 9557^2 + 8808^2 .

It is a cyclic number.

It is not a de Polignac number, because 168917113 - 2⁵ = 168917081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168917183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384506 + ... + 1384627.

It is an arithmetic number, because the mean of its divisors is an integer number (42921577).

Almost surely, 2^168917113 is an apocalyptic number.

It is an amenable number.

168917113 is a deficient number, since it is larger than the sum of its proper divisors (2769195).

168917113 is an equidigital number, since it uses as much as digits as its factorization.

168917113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769194.

The product of its digits is 9072, while the sum is 37.

The square root of 168917113 is about 12996.8116474772. The cubic root of 168917113 is about 552.7870792973.

The spelling of 168917113 in words is "one hundred sixty-eight million, nine hundred seventeen thousand, one hundred thirteen".