1787
1787 is the year the United States Constitution was drafted.
- Odd
- Prime
Where 1787 fits
Why 1787 is special
It was written in a closed session over four months by delegates sent to amend a different document. It is the oldest written national constitution still in force, and has been amended 27 times in 238 years.
1787 is part of
Factors & digit properties
- Divisors (2)
- 1, 1787
- Prime factorisation
- 1787
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 1787
- Binary
- 11011111011
- Octal
- 3373
- Hexadecimal
- 6fb
- Roman numeral
- MDCCLXXXVII
- Scientific notation
- 1.787 × 10^3
Other mathematical patterns
- Deficient number
- Twin prime
Related numbers & connections
The Bill of Rights was ratified in 1791 because several states would not accept the 1787 Constitution without written guarantees.
View 1791 →Law & regulation
The 1787 convention was convened to revise the Articles of Confederation and instead replaced them entirely, in closed session. The resulting document is the oldest national constitution still operating, which is partly a function of how hard it made its own amendment.
DocumentedLaw & regulationGeography: United StatesPeriod: 1787
Common questions
Is 1787 a prime number?
Yes, 1787 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1787?
The factors of 1787 are 1, 1787.
What is 1787 in Roman numerals?
1787 in Roman numerals is MDCCLXXXVII.
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