849

849 is a natural number that follows 848 and precedes 850. In mathematics, it is an odd composite number with prime factorization 3 × 283, since 3 and 283 are prime. The sum of its digits is 21, so 849 is divisible by 3 but not by 9. It is not a prime number and has exactly these prime factors.

In numeral representations, 849 is written in Roman numerals as DCCCXLIX. In binary it is 1101010001, and in hexadecimal it is 0x351.

In telecommunications, 849 is an overlay area code within the North American Numbering Plan assigned to the Dominican Republic, used alongside the existing 809 and 829 codes to serve the country.

Historically, the year 849 CE falls in the 9th century, during the period of the Carolingian era in Europe. It was a time of ongoing political and social changes across the region, with various kingdoms and cultural developments shaping the broader transition from the early medieval period.