One Hundred Thirty-Nine is a numerical value that follows One Hundred Thirty-Eight and precedes One Hundred Forty. It is an integer and can be expressed in various forms, such as Roman numerals (CXXXIX) or in binary (10001011). This number is often used in mathematics, statistics, and everyday counting. In terms of its properties, One Hundred Thirty-Nine is classified as a prime number, meaning it has no divisors other than one and itself. Prime numbers, like Two and Three, are fundamental in number theory and have applications in fields such as cryptography and computer science.