171668109 has 8 divisors (see below), whose sum is σ = 229874112. Its totient is φ = 113953760.

The previous prime is 171668093. The next prime is 171668117. The reversal of 171668109 is 901866171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 171668109 - 2⁴ = 171668093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171668129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122097 + ... + 123494.

It is an arithmetic number, because the mean of its divisors is an integer number (28734264).

Almost surely, 2^171668109 is an apocalyptic number.

It is an amenable number.

171668109 is a deficient number, since it is larger than the sum of its proper divisors (58206003).

171668109 is a wasteful number, since it uses less digits than its factorization.

171668109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245827.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 171668109 is about 13102.2177130438. The cubic root of 171668109 is about 555.7718438743.

The spelling of 171668109 in words is "one hundred seventy-one million, six hundred sixty-eight thousand, one hundred nine".