73543 has 4 divisors (see below), whose sum is σ = 74088. Its totient is φ = 73000.

The previous prime is 73529. The next prime is 73547. The reversal of 73543 is 34537.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73543 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

73543 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105 + ... + 397.

It is an arithmetic number, because the mean of its divisors is an integer number (18522).

2⁷³⁵⁴³ is an apocalyptic number.

73543 is a deficient number, since it is larger than the sum of its proper divisors (545).

73543 is a wasteful number, since it uses less digits than its factorization.

73543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544.

The product of its digits is 1260, while the sum is 22.

The square root of 73543 is about 271.1881265837. The cubic root of 73543 is about 41.8967607994.

It can be divided in two parts, 73 and 543, that added together give a palindrome (616).

The spelling of 73543 in words is "seventy-three thousand, five hundred forty-three".