1819
1819 is the year of the Peterloo massacre.
- Odd
- Composite
Where 1819 fits
Why 1819 is special
Cavalry charged a peaceful crowd of around 60,000 demanding parliamentary reform, killing eighteen. The government's response was to restrict public meetings further, and the reform demanded took another thirteen years.
Factors & digit properties
- Divisors (4)
- 1, 17, 107, 1819
- Prime factorisation
- 17 × 107
- Digit sum
- 19
- Digital root
- 1
Representations
- Decimal
- 1819
- Binary
- 11100011011
- Octal
- 3433
- Hexadecimal
- 71b
- Roman numeral
- MDCCCXIX
- Scientific notation
- 1.819 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
The Gordon Riots of 1780 were protest that outran its organisers; Peterloo in 1819 was a peaceful meeting charged by cavalry. The state's response differed from the disorder in both cases.
View 1780 →History
Cavalry charged a reform meeting at Manchester in 1819, killing eighteen and injuring hundreds. Parliament responded by passing acts further limiting public assembly and the press. The reform being asked for arrived in 1832.
DocumentedHistoryGeography: Manchester, EnglandPeriod: 1819
Common questions
Is 1819 a prime number?
No, 1819 is not prime.
What are the factors of 1819?
The factors of 1819 are 1, 17, 107, 1819.
What is 1819 in Roman numerals?
1819 in Roman numerals is MDCCCXIX.
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