171317872 has 20 divisors (see below), whose sum is σ = 362104056. Its totient is φ = 77871680.

The previous prime is 171317837. The next prime is 171317879. The reversal of 171317872 is 278713171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171317879) 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, 486523 + ... + 486874.

Almost surely, 2^171317872 is an apocalyptic number.

It is an amenable number.

171317872 is an abundant number, since it is smaller than the sum of its proper divisors (190786184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171317872 is a wasteful number, since it uses less digits than its factorization.

171317872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973416 (or 973410 counting only the distinct ones).

The product of its digits is 16464, while the sum is 37.

The square root of 171317872 is about 13088.8453272242. The cubic root of 171317872 is about 555.3936249362.

The spelling of 171317872 in words is "one hundred seventy-one million, three hundred seventeen thousand, eight hundred seventy-two".