The number 73 is classified as a prime number, meaning it is greater than 1 and has no positive divisors other than 1 and itself. This makes it unique in the realm of numbers, as it cannot be formed by multiplying two smaller natural numbers. In addition to its mathematical properties, 73 holds significance in various fields. For instance, in the realm of computer science, it is often used in hash functions and algorithms due to its prime nature, which helps in reducing collisions. Furthermore, 73 is also notable in popular culture, appearing in various references and trivia.