543423 has 4 divisors (see below), whose sum is σ = 724568. Its totient is φ = 362280.

The previous prime is 543407. The next prime is 543427. The reversal of 543423 is 324345.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 543423 - 2⁴ = 543407 is a prime.

It is a D-number.

It is a Duffinian number.

543423 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 543423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543427) 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, 90568 + ... + 90573.

It is an arithmetic number, because the mean of its divisors is an integer number (181142).

2⁵⁴³⁴²³ is an apocalyptic number.

543423 is a deficient number, since it is larger than the sum of its proper divisors (181145).

543423 is a wasteful number, since it uses less digits than its factorization.

543423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181144.

The product of its digits is 1440, while the sum is 21.

The square root of 543423 is about 737.1723000764. The cubic root of 543423 is about 81.6042301248.

Adding to 543423 its reverse (324345), we get a palindrome (867768).

It can be divided in two parts, 54342 and 3, that added together give a palindrome (54345).

The spelling of 543423 in words is "five hundred forty-three thousand, four hundred twenty-three".