843

843 is an integer. In base-10 notation it follows 842 and precedes 844.

In mathematics, 843 is a composite number with prime factorization 3 × 281. Since 281 is prime, the factorization is complete. It is divisible by 3 but not by 9 or 5, and its digit sum is 15, giving a digital root of 6.

In various numeral systems, 843 is 1101001011 in binary, 0x34B in hexadecimal, and 1513 in octal. In Roman numerals, it is written as DCCCXLIII.

In the year 843, the Treaty of Verdun was signed, dividing the Carolingian Empire among Louis the German, Lothar I, and Charles the Bald. The agreement helped establish the early medieval borders of Europe and laid groundwork for the future division into distinct political regions.

In geography and telecommunications, area code 843 covers parts of South Carolina in the United States, including coastal and southern regions. It was created in 1998 as a split from the original area code 803.