73443 has 4 divisors (see below), whose sum is σ = 97928. Its totient is φ = 48960.

The previous prime is 73433. The next prime is 73453. The reversal of 73443 is 34437.

Added to its reverse (34437) it gives a triangular number (107880 = T₄₆₄).

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

It is an interprime number because it is at equal distance from previous prime (73433) and next prime (73453).

It is not a de Polignac number, because 73443 - 2⁶ = 73379 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73433) 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, 12238 + ... + 12243.

It is an arithmetic number, because the mean of its divisors is an integer number (24482).

2⁷³⁴⁴³ is an apocalyptic number.

73443 is a deficient number, since it is larger than the sum of its proper divisors (24485).

73443 is a wasteful number, since it uses less digits than its factorization.

73443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24484.

The product of its digits is 1008, while the sum is 21.

The square root of 73443 is about 271.0036900118. The cubic root of 73443 is about 41.8777624969.

Adding to 73443 its reverse (34437), we get a triangular number (107880 = T₄₆₄).

It can be divided in two parts, 734 and 43, that added together give a palindrome (777).

The spelling of 73443 in words is "seventy-three thousand, four hundred forty-three", and thus it is an iban number.