172393171 has 4 divisors (see below), whose sum is σ = 172703232. Its totient is φ = 172083112.

The previous prime is 172393121. The next prime is 172393189. The reversal of 172393171 is 171393271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171393271 = 7 ⋅24484753.

It is a cyclic number.

It is not a de Polignac number, because 172393171 - 2⁷ = 172393043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172393121) 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, 154195 + ... + 155308.

It is an arithmetic number, because the mean of its divisors is an integer number (43175808).

Almost surely, 2^172393171 is an apocalyptic number.

172393171 is a deficient number, since it is larger than the sum of its proper divisors (310061).

172393171 is an equidigital number, since it uses as much as digits as its factorization.

172393171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310060.

The product of its digits is 7938, while the sum is 34.

The square root of 172393171 is about 13129.8579961856. The cubic root of 172393171 is about 556.5532024392.

The spelling of 172393171 in words is "one hundred seventy-two million, three hundred ninety-three thousand, one hundred seventy-one".