The number 89 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 the context of mathematics, prime numbers like 89 play a crucial role in number theory and are fundamental in various applications, including cryptography. The sequence of prime numbers begins with 2, 3, 5, 7, and continues with 89 as the 24th prime number.