1203823 has 4 divisors (see below), whose sum is σ = 1242688. Its totient is φ = 1164960.

The previous prime is 1203817. The next prime is 1203827. The reversal of 1203823 is 3283021.

It is a happy number.

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 1203823 - 2⁵ = 1203791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1203823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203827) 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, 19386 + ... + 19447.

It is an arithmetic number, because the mean of its divisors is an integer number (310672).

2^1203823 is an apocalyptic number.

1203823 is a deficient number, since it is larger than the sum of its proper divisors (38865).

1203823 is an equidigital number, since it uses as much as digits as its factorization.

1203823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38864.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1203823 is about 1097.1886802187. The cubic root of 1203823 is about 106.3785857275.

Adding to 1203823 its reverse (3283021), we get a palindrome (4486844).

The spelling of 1203823 in words is "one million, two hundred three thousand, eight hundred twenty-three".