168716197 has 4 divisors (see below), whose sum is σ = 181694380. Its totient is φ = 155738016.

The previous prime is 168716173. The next prime is 168716227. The reversal of 168716197 is 791617861.

168716197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8288641 + 160427556 = 2879^2 + 12666^2 .

It is a cyclic number.

It is not a de Polignac number, because 168716197 - 2⁷ = 168716069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168716297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6489072 + ... + 6489097.

It is an arithmetic number, because the mean of its divisors is an integer number (45423595).

Almost surely, 2^168716197 is an apocalyptic number.

It is an amenable number.

168716197 is a deficient number, since it is larger than the sum of its proper divisors (12978183).

168716197 is a wasteful number, since it uses less digits than its factorization.

168716197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12978182.

The product of its digits is 127008, while the sum is 46.

The square root of 168716197 is about 12989.0799135274. The cubic root of 168716197 is about 552.5678241641.

The spelling of 168716197 in words is "one hundred sixty-eight million, seven hundred sixteen thousand, one hundred ninety-seven".