823173 has 8 divisors (see below), whose sum is σ = 1182048. Its totient is φ = 506544.

The previous prime is 823169. The next prime is 823177. The reversal of 823173 is 371328.

823173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (823169) and next prime (823177).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 823173 - 2² = 823169 is a prime.

It is a super-2 number, since 2×823173² = 1355227575858, which contains 22 as substring.

It is a Curzon number.

823173 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10515 + ... + 10592.

It is an arithmetic number, because the mean of its divisors is an integer number (147756).

2⁸²³¹⁷³ is an apocalyptic number.

It is an amenable number.

823173 is a deficient number, since it is larger than the sum of its proper divisors (358875).

823173 is a wasteful number, since it uses less digits than its factorization.

823173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21123.

The product of its digits is 1008, while the sum is 24.

The square root of 823173 is about 907.2888184035. The cubic root of 823173 is about 93.7195883580.

The spelling of 823173 in words is "eight hundred twenty-three thousand, one hundred seventy-three".