543403 has 8 divisors (see below), whose sum is σ = 626400. Its totient is φ = 461760.

The previous prime is 543383. The next prime is 543407. The reversal of 543403 is 304345.

543403 is a nontrivial binomial coefficient, being equal to C(1043, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 543403 - 2⁹ = 542891 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (543407) 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, 783 + ... + 1303.

It is an arithmetic number, because the mean of its divisors is an integer number (78300).

2⁵⁴³⁴⁰³ is an apocalyptic number.

543403 is the 1042-nd triangular number.

543403 is the 348-th centered nonagonal number.

543403 is a deficient number, since it is larger than the sum of its proper divisors (82997).

543403 is a wasteful number, since it uses less digits than its factorization.

543403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 543403 is about 737.1587346020. The cubic root of 543403 is about 81.6032289988.

Adding to 543403 its reverse (304345), we get a palindrome (847748).

It can be divided in two parts, 543 and 403, that added together give a triangular number (946 = T₄₃).

The spelling of 543403 in words is "five hundred forty-three thousand, four hundred three".