172929 has 8 divisors (see below), whose sum is σ = 234720. Its totient is φ = 113216.

The previous prime is 172883. The next prime is 172933. The reversal of 172929 is 929271.

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 172929 - 2⁷ = 172801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172896 and 172905.

It is not an unprimeable number, because it can be changed into a prime (172969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (29340).

2¹⁷²⁹²⁹ is an apocalyptic number.

It is an amenable number.

172929 is a deficient number, since it is larger than the sum of its proper divisors (61791).

172929 is an equidigital number, since it uses as much as digits as its factorization.

172929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039.

The product of its digits is 2268, while the sum is 30.

The square root of 172929 is about 415.8473277538. The cubic root of 172929 is about 55.7129228557.

The spelling of 172929 in words is "one hundred seventy-two thousand, nine hundred twenty-nine".