243423 has 24 divisors (see below), whose sum is σ = 391248. Its totient is φ = 145152.

The previous prime is 243421. The next prime is 243431. The reversal of 243423 is 324342.

243423 is a `hidden beast` number, since 243 + 423 = 666.

243423 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 243423 - 2¹ = 243421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243396 and 243405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5640 + ... + 5682.

It is an arithmetic number, because the mean of its divisors is an integer number (16302).

2²⁴³⁴²³ is an apocalyptic number.

243423 is a deficient number, since it is larger than the sum of its proper divisors (147825).

243423 is a wasteful number, since it uses less digits than its factorization.

243423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 100 counting only the distinct ones).

The product of its digits is 576, while the sum is 18.

The square root of 243423 is about 493.3791645378. The cubic root of 243423 is about 62.4387025683.

Adding to 243423 its reverse (324342), we get a palindrome (567765).

It can be divided in two parts, 243 and 423, that added together give a palindrome (666).

The spelling of 243423 in words is "two hundred forty-three thousand, four hundred twenty-three", and thus it is an iban number.