168171697 has 4 divisors (see below), whose sum is σ = 172716916. Its totient is φ = 163626480.

The previous prime is 168171691. The next prime is 168171719. The reversal of 168171697 is 796171861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796171861 = 109 ⋅7304329.

It can be written as a sum of positive squares in 2 ways, for example, as 161010721 + 7160976 = 12689^2 + 2676^2 .

It is a cyclic number.

It is not a de Polignac number, because 168171697 - 2¹¹ = 168169649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168171691) 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, 2272554 + ... + 2272627.

It is an arithmetic number, because the mean of its divisors is an integer number (43179229).

Almost surely, 2^168171697 is an apocalyptic number.

It is an amenable number.

168171697 is a deficient number, since it is larger than the sum of its proper divisors (4545219).

168171697 is an equidigital number, since it uses as much as digits as its factorization.

168171697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545218.

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

The square root of 168171697 is about 12968.1030609723. The cubic root of 168171697 is about 551.9727470705.

The spelling of 168171697 in words is "one hundred sixty-eight million, one hundred seventy-one thousand, six hundred ninety-seven".