The number 209 is an integer that follows 208 and precedes 210. It is an odd number and can be expressed as the sum of two prime numbers, specifically 103 + 106. In mathematics, it is classified as a composite number because it has divisors other than one and itself. In the context of geography, 209 is also the area code for a region in California, covering cities such as Stockton and Modesto. This area code was established in 1959 and is part of the North American Numbering Plan, which organizes telephone numbers in the United States.