203423 has 4 divisors (see below), whose sum is σ = 221928. Its totient is φ = 184920.

The previous prime is 203419. The next prime is 203429. The reversal of 203423 is 324302.

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 203423 - 2² = 203419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203398 and 203407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9236 + ... + 9257.

It is an arithmetic number, because the mean of its divisors is an integer number (55482).

2²⁰³⁴²³ is an apocalyptic number.

203423 is a deficient number, since it is larger than the sum of its proper divisors (18505).

203423 is a wasteful number, since it uses less digits than its factorization.

203423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18504.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 203423 is about 451.0243895844. The cubic root of 203423 is about 58.8120997205.

Adding to 203423 its reverse (324302), we get a palindrome (527725).

It can be divided in two parts, 203 and 423, that added together give a palindrome (626).

The spelling of 203423 in words is "two hundred three thousand, four hundred twenty-three", and thus it is an iban number.