168731117 has 2 divisors, whose sum is σ = 168731118. Its totient is φ = 168731116.

The previous prime is 168731083. The next prime is 168731131. The reversal of 168731117 is 711137861.

168731117 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., 168454441 + 276676 = 12979^2 + 526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168731117 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 (168731177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84365558 + 84365559.

It is an arithmetic number, because the mean of its divisors is an integer number (84365559).

Almost surely, 2^168731117 is an apocalyptic number.

It is an amenable number.

168731117 is a deficient number, since it is larger than the sum of its proper divisors (1).

168731117 is an equidigital number, since it uses as much as digits as its factorization.

168731117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 35.

The square root of 168731117 is about 12989.6542294243. The cubic root of 168731117 is about 552.5841120074.

Adding to 168731117 its reverse (711137861), we get a palindrome (879868978).

The spelling of 168731117 in words is "one hundred sixty-eight million, seven hundred thirty-one thousand, one hundred seventeen".