172170169 has 8 divisors (see below), whose sum is σ = 184003488. Its totient is φ = 160526400.

The previous prime is 172170143. The next prime is 172170179. The reversal of 172170169 is 961071271.

172170169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 172170169 - 2⁷ = 172170041 is a prime.

It is a super-2 number, since 2×172170169² = 59285134186977122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172170109) 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, 45507 + ... + 49144.

It is an arithmetic number, because the mean of its divisors is an integer number (23000436).

Almost surely, 2^172170169 is an apocalyptic number.

It is an amenable number.

172170169 is a deficient number, since it is larger than the sum of its proper divisors (11833319).

172170169 is a wasteful number, since it uses less digits than its factorization.

172170169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94775.

The product of its (nonzero) digits is 5292, while the sum is 34.

The square root of 172170169 is about 13121.3630770587. The cubic root of 172170169 is about 556.3131193955.

The spelling of 172170169 in words is "one hundred seventy-two million, one hundred seventy thousand, one hundred sixty-nine".