13509

13509 is a number that falls between 13508 and 13510 in the sequence of natural numbers. It is an odd number, as it cannot be evenly divided by 2. In the decimal system, it is written as "thirteen thousand five hundred nine." In scientific notation, it is expressed as 1.3509 x 10^4.

The number 13509 has several mathematical properties. It is a composite number, meaning it has factors other than 1 and itself. Its prime factorization is 3 x 3 x 3 x 3 x 3 x 5 x 11, which indicates it is a product of the prime numbers 3, 5, and 11, each raised to a certain power. The sum of its digits is 18, and it is divisible by 3, 5, and 9.

In the context of computer science, 13509 is often used as a port number in networking protocols. Port numbers are used to identify specific processes or services on a computer. The port number 13509 is not assigned to any specific service in the Internet Assigned Numbers Authority (IANA) database, but it can be used for custom or private purposes.

In popular culture, 13509 does not hold any significant meaning. It is not associated with any notable events, people, or phenomena. However, it can be used as a trivia question in quizzes or games, where participants are asked to identify the number that falls between 13508 and 13510.