843
843 is the year the Treaty of Verdun divided the Carolingian Empire.
- Odd
- Composite
Where 843 fits
Why 843 is special
Charlemagne's empire was split three ways among his grandsons, and the boundaries drawn roughly prefigure France, Germany and a contested strip between them fought over for the next eleven centuries.
Factors & digit properties
- Divisors (4)
- 1, 3, 281, 843
- Prime factorisation
- 3 × 281
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 843
- Binary
- 1101001011
- Octal
- 1513
- Hexadecimal
- 34b
- Roman numeral
- DCCCXLIII
- Scientific notation
- 8.430 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
- Lucas number
Related numbers & connections
Charlemagne was crowned in 800 and his empire was divided at Verdun in 843, drawing a border between France and Germany that was contested into the twentieth century.
View 800 →Other connections
- developed from800
why?
Strength 0.50, confidence "high".
History
Verdun in 843 divided the Frankish empire into western, eastern and middle kingdoms. The middle strip — Lotharingia — became the contested ground between France and Germany into the twentieth century.
DocumentedHistoryGeography: Carolingian EmpirePeriod: 843
Common questions
Is 843 a prime number?
No, 843 is not prime.
What are the factors of 843?
The factors of 843 are 1, 3, 281, 843.
What is 843 in Roman numerals?
843 in Roman numerals is DCCCXLIII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026