172171307 has 32 divisors (see below), whose sum is σ = 227487744. Its totient is φ = 126324000.

The previous prime is 172171297. The next prime is 172171309. The reversal of 172171307 is 703171271.

It is not a de Polignac number, because 172171307 - 2¹⁰ = 172170283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172171307.

It is not an unprimeable number, because it can be changed into a prime (172171309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117932 + ... + 119382.

It is an arithmetic number, because the mean of its divisors is an integer number (7108992).

Almost surely, 2^172171307 is an apocalyptic number.

172171307 is a deficient number, since it is larger than the sum of its proper divisors (55316437).

172171307 is a wasteful number, since it uses less digits than its factorization.

172171307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559.

The product of its (nonzero) digits is 2058, while the sum is 29.

The square root of 172171307 is about 13121.4064413842. The cubic root of 172171307 is about 556.3143450877.

The spelling of 172171307 in words is "one hundred seventy-two million, one hundred seventy-one thousand, three hundred seven".