172823 has 6 divisors (see below), whose sum is σ = 201096. Its totient is φ = 148092.

The previous prime is 172807. The next prime is 172829. The reversal of 172823 is 328271.

172823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172823 - 2⁴ = 172807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1715 + ... + 1812.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

2¹⁷²⁸²³ is an apocalyptic number.

172823 is a deficient number, since it is larger than the sum of its proper divisors (28273).

172823 is an equidigital number, since it uses as much as digits as its factorization.

172823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541 (or 3534 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 172823 is about 415.7198575964. The cubic root of 172823 is about 55.7015371100.

The spelling of 172823 in words is "one hundred seventy-two thousand, eight hundred twenty-three".