617

617 is a natural number that follows 616 and precedes 618. In mathematics, it is an odd prime number. Its Roman numeral representation is DCXVII. As a three-digit decimal, it has a digit sum of 14 and is not a palindrome.

617 AD falls within the period of the Byzantine–Sassanid War (602–628). During this phase, the Persian Empire advanced deep into the eastern Byzantine territories, with significant military campaigns and rapid territorial changes affecting Syria, Mesopotamia, and neighboring regions.

617 Patroclus is a Jupiter Trojan asteroid. Discovered in 1906 by August Kopff, it is named after the Greek mythological figure Patroclus. The object is notable for hosting a small companion, Menoetius, forming a binary system with a moon observed in subsequent studies.

Mercedes-Benz OM617 is a well-known 5-cylinder diesel engine produced by Mercedes-Benz starting in the 1970s. It powered a variety of passenger cars and commercial vehicles and is noted for durability and ease of maintenance.

617 is the area code for Boston, Massachusetts, in the United States. It covers the city and surrounding communities and operates within the North American Numbering Plan; the 857 area code serves as an overlay.