173172379 has 4 divisors (see below), whose sum is σ = 173229840. Its totient is φ = 173114920.

The previous prime is 173172361. The next prime is 173172383. The reversal of 173172379 is 973271371.

173172379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 973271371 = 19 ⋅51224809.

It is a cyclic number.

It is not a de Polignac number, because 173172379 - 2⁵ = 173172347 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173170379) 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, 23944 + ... + 30325.

It is an arithmetic number, because the mean of its divisors is an integer number (43307460).

Almost surely, 2^173172379 is an apocalyptic number.

173172379 is a deficient number, since it is larger than the sum of its proper divisors (57461).

173172379 is an equidigital number, since it uses as much as digits as its factorization.

173172379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57460.

The product of its digits is 55566, while the sum is 40.

The square root of 173172379 is about 13159.4976727837. The cubic root of 173172379 is about 557.3904725614.

The spelling of 173172379 in words is "one hundred seventy-three million, one hundred seventy-two thousand, three hundred seventy-nine".