1789
1789 is the year the French Revolution began and the United States Constitution took effect.
- Odd
- Prime
Where 1789 fits
Why 1789 is special
1789 carried two revolutions reaching different stages. The Bastille was stormed in July and the Declaration of the Rights of Man adopted in August; across the Atlantic the US Constitution came into force in March and Washington was inaugurated in April. The French and American events were connected — several key figures had served in both.
1789 is part of
Factors & digit properties
- Divisors (2)
- 1, 1789
- Prime factorisation
- 1789
- Digit sum
- 25
- Digital root
- 7
Representations
- Decimal
- 1789
- Binary
- 11011111101
- Octal
- 3375
- Hexadecimal
- 6fd
- Roman numeral
- MDCCLXXXIX
- Scientific notation
- 1.789 × 10^3
Other mathematical patterns
- Deficient number
- Twin prime
Related numbers & connections
Thirteen years separate the American declaration from the fall of the Bastille, and the link is documented: Lafayette fought in the first war and helped draft the Rights of Man, while French debt from that support helped bring on the second crisis.
View 1776 →The Haitian Revolution invoked the principles of the French Revolution and was fought against France to establish them. The gap between the two dates is the distance between declaring universal rights and conceding them.
View 1804 →History
The US Constitution took effect in March 1789 and the Bastille fell in July. The connection is not coincidence: Lafayette had served in the American war and drafted the Declaration of the Rights of Man with Jefferson's input, and French debt from supporting that war was among the pressures that brought the crisis on.
DocumentedHistoryGeography: France and the United States
Common questions
Is 1789 a prime number?
Yes, 1789 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1789?
The factors of 1789 are 1, 1789.
What is 1789 in Roman numerals?
1789 in Roman numerals is MDCCLXXXIX.
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