208823 has 4 divisors (see below), whose sum is σ = 209760. Its totient is φ = 207888.

The previous prime is 208807. The next prime is 208837. The reversal of 208823 is 328802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 208823 - 2⁴ = 208807 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 (208843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (52440).

2²⁰⁸⁸²³ is an apocalyptic number.

208823 is a deficient number, since it is larger than the sum of its proper divisors (937).

208823 is an equidigital number, since it uses as much as digits as its factorization.

208823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 208823 is about 456.9715527251. The cubic root of 208823 is about 59.3279638564.

The spelling of 208823 in words is "two hundred eight thousand, eight hundred twenty-three".