168188117 has 2 divisors, whose sum is σ = 168188118. Its totient is φ = 168188116.

The previous prime is 168188107. The next prime is 168188143. The reversal of 168188117 is 711881861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160757041 + 7431076 = 12679^2 + 2726^2 .

It is a cyclic number.

It is not a de Polignac number, because 168188117 - 2⁴ = 168188101 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 (168188107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84094058 + 84094059.

It is an arithmetic number, because the mean of its divisors is an integer number (84094059).

Almost surely, 2^168188117 is an apocalyptic number.

It is an amenable number.

168188117 is a deficient number, since it is larger than the sum of its proper divisors (1).

168188117 is an equidigital number, since it uses as much as digits as its factorization.

168188117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 41.

The square root of 168188117 is about 12968.7361373420. The cubic root of 168188117 is about 551.9907110476.

It can be divided in two parts, 1681 and 88117, that added together give a palindrome (89798).

The spelling of 168188117 in words is "one hundred sixty-eight million, one hundred eighty-eight thousand, one hundred seventeen".