1803823 has 4 divisors (see below), whose sum is σ = 2061520. Its totient is φ = 1546128.

The previous prime is 1803817. The next prime is 1803863. The reversal of 1803823 is 3283081.

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 1803823 - 2¹⁷ = 1672751 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 (1803863) 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, 128838 + ... + 128851.

It is an arithmetic number, because the mean of its divisors is an integer number (515380).

2^1803823 is an apocalyptic number.

1803823 is a deficient number, since it is larger than the sum of its proper divisors (257697).

1803823 is an equidigital number, since it uses as much as digits as its factorization.

1803823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257696.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1803823 is about 1343.0647787802. The cubic root of 1803823 is about 121.7300984888.

The spelling of 1803823 in words is "one million, eight hundred three thousand, eight hundred twenty-three".