203823 has 8 divisors (see below), whose sum is σ = 302000. Its totient is φ = 135864.

The previous prime is 203821. The next prime is 203843. The reversal of 203823 is 328302.

It is not a de Polignac number, because 203823 - 2¹ = 203821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203796 and 203805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203821) 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, 3748 + ... + 3801.

It is an arithmetic number, because the mean of its divisors is an integer number (37750).

2²⁰³⁸²³ is an apocalyptic number.

203823 is a deficient number, since it is larger than the sum of its proper divisors (98177).

203823 is an equidigital number, since it uses as much as digits as its factorization.

203823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7558 (or 7552 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 203823 is about 451.4676068114. The cubic root of 203823 is about 58.8506227937.

Adding to 203823 its sum of digits (18), we get a triangular number (203841 = T₆₃₈).

The spelling of 203823 in words is "two hundred three thousand, eight hundred twenty-three".