847

847 is a natural number that comes after 846 and before 848. In mathematics, it is an odd composite number with prime factorization 7 × 11². Its positive divisors are 1, 7, 11, 77, 121, and 847. In Roman numerals, 847 is written as DCCCXLVII.

847 also denotes a calendar year, specifically 847 CE in the Anno Domini / Common Era system. It falls within the early to middle part of the 9th century, a period characterized by numerous regional histories across Europe, the Byzantine world, and the broader Eurasian landscape. Details vary by source and region.

In telecommunications, 847 is an area code in the North American Numbering Plan. It covers parts of northeastern Illinois, including the Chicago metropolitan area; the 847 region is also served by the 224 area code as an overlay.

As a number, 847 is sometimes used in identifiers, product codes, or other cataloging schemes, but it does not have a widely recognized standalone meaning beyond its numerical properties.