172879 has 4 divisors (see below), whose sum is σ = 197584. Its totient is φ = 148176.

The previous prime is 172877. The next prime is 172883. The reversal of 172879 is 978271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978271 = 7 ⋅139753.

It is not a de Polignac number, because 172879 - 2¹ = 172877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172871) 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, 12342 + ... + 12355.

It is an arithmetic number, because the mean of its divisors is an integer number (49396).

2¹⁷²⁸⁷⁹ is an apocalyptic number.

172879 is a deficient number, since it is larger than the sum of its proper divisors (24705).

172879 is an equidigital number, since it uses as much as digits as its factorization.

172879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24704.

The product of its digits is 7056, while the sum is 34.

The square root of 172879 is about 415.7872051903. The cubic root of 172879 is about 55.7075528009.

The spelling of 172879 in words is "one hundred seventy-two thousand, eight hundred seventy-nine".