2005823 has 4 divisors (see below), whose sum is σ = 2039880. Its totient is φ = 1971768.

The previous prime is 2005799. The next prime is 2005831. The reversal of 2005823 is 3285002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2005823 - 2⁸ = 2005567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2005795 and 2005804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16940 + ... + 17057.

It is an arithmetic number, because the mean of its divisors is an integer number (509970).

2^2005823 is an apocalyptic number.

2005823 is a deficient number, since it is larger than the sum of its proper divisors (34057).

2005823 is an equidigital number, since it uses as much as digits as its factorization.

2005823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34056.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2005823 is about 1416.2708074376. The cubic root of 2005823 is about 126.1142618507.

The spelling of 2005823 in words is "two million, five thousand, eight hundred twenty-three".