9543 has 4 divisors (see below), whose sum is σ = 12728. Its totient is φ = 6360.

The previous prime is 9539. The next prime is 9547. The reversal of 9543 is 3459.

9543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3459 = 3 ⋅1153.

It is an interprime number because it is at equal distance from previous prime (9539) and next prime (9547).

It is not a de Polignac number, because 9543 - 2² = 9539 is a prime.

It is a D-number.

It is a Duffinian number.

9543 is a lucky number.

It is a plaindrome in base 14.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1588 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (3182).

2⁹⁵⁴³ is an apocalyptic number.

9543 is a deficient number, since it is larger than the sum of its proper divisors (3185).

9543 is a wasteful number, since it uses less digits than its factorization.

9543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184.

The product of its digits is 540, while the sum is 21.

The square root of 9543 is about 97.6882797474. The cubic root of 9543 is about 21.2110242888.

Subtracting from 9543 its reverse (3459), we obtain a square (6084 = 78²).

The spelling of 9543 in words is "nine thousand, five hundred forty-three".