172117173 has 8 divisors (see below), whose sum is σ = 233251936. Its totient is φ = 112863600.

The previous prime is 172117159. The next prime is 172117217. The reversal of 172117173 is 371711271.

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

It is not a de Polignac number, because 172117173 - 2⁶ = 172117109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172117173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172117103) 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, 470083 + ... + 470448.

It is an arithmetic number, because the mean of its divisors is an integer number (29156492).

Almost surely, 2^172117173 is an apocalyptic number.

It is an amenable number.

172117173 is a deficient number, since it is larger than the sum of its proper divisors (61134763).

172117173 is an equidigital number, since it uses as much as digits as its factorization.

172117173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940595.

The product of its digits is 2058, while the sum is 30.

The square root of 172117173 is about 13119.3434668050. The cubic root of 172117173 is about 556.2560336340.

The spelling of 172117173 in words is "one hundred seventy-two million, one hundred seventeen thousand, one hundred seventy-three".