172717172 has 12 divisors (see below), whose sum is σ = 302348256. Its totient is φ = 86331960.

The previous prime is 172717157. The next prime is 172717177. The reversal of 172717172 is 271717271.

172717172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172717177) 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, 18503 + ... + 26225.

It is an arithmetic number, because the mean of its divisors is an integer number (25195688).

Almost surely, 2^172717172 is an apocalyptic number.

It is an amenable number.

172717172 is a deficient number, since it is larger than the sum of its proper divisors (129631084).

172717172 is a wasteful number, since it uses less digits than its factorization.

172717172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13318 (or 13316 counting only the distinct ones).

The product of its digits is 9604, while the sum is 35.

The square root of 172717172 is about 13142.1905327841. The cubic root of 172717172 is about 556.9016519403.

Subtracting 172717172 from its reverse (271717271), we obtain a palindrome (99000099).

The spelling of 172717172 in words is "one hundred seventy-two million, seven hundred seventeen thousand, one hundred seventy-two".