163823 has 8 divisors (see below), whose sum is σ = 182736. Its totient is φ = 145600.

The previous prime is 163819. The next prime is 163841. The reversal of 163823 is 328361.

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 163823 - 2² = 163819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 163823.

It is not an unprimeable number, because it can be changed into a prime (163853) 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, 443 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (22842).

2¹⁶³⁸²³ is an apocalyptic number.

163823 is a deficient number, since it is larger than the sum of its proper divisors (18913).

163823 is a wasteful number, since it uses less digits than its factorization.

163823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345.

The product of its digits is 864, while the sum is 23.

The square root of 163823 is about 404.7505404567. The cubic root of 163823 is about 54.7173376767.

It can be divided in two parts, 1638 and 23, that added together give a palindrome (1661).

The spelling of 163823 in words is "one hundred sixty-three thousand, eight hundred twenty-three".