1679
1679 is the year the Habeas Corpus Act was passed.
- Odd
- Composite
Where 1679 fits
Why 1679 is special
It required that a detained person be brought before a court to test the lawfulness of the detention. The principle predates the Act, which made it enforceable rather than merely available.
Same number, different meanings
How 1679 is understood across different contexts — never implying one meaning because of another.
- Mathematics
It required that a detained person be brought before a court to test the lawfulness of the detention. The principle predates the Act, which made it enforceable rather than merely available.
- History
In 1679, the Habeas Corpus Act required that a detained person be brought before a court, a protection widely copied since (England).
- Law & regulation
Habeas corpus existed before 1679; the Act supplied penalties for officials who ignored it and closed the loopholes that had made it evadable. Rights without enforcement mechanisms is the problem it was written to solve.
1679 is part of
Factors & digit properties
- Divisors (4)
- 1, 23, 73, 1679
- Prime factorisation
- 23 × 73
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 1679
- Scientific notation
- 1.679 × 10^3
Roman numerals
M D C L X X I X
MDCLXXIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 1 0 1 0 0 0 1 1 1 1
1 × 1,024 + 1 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 1,679
Octal
3 2 1 7
3 × 512 + 2 × 64 + 1 × 8 + 7 × 1 = 1,679
Hexadecimal
6 8 f
6 × 256 + 8 × 16 + f × 1 = 1,679
Read as powers of two: 1,024 + 512 + 128 + 8 + 4 + 2 + 1 = 1,679.
In historical numeral systems
Egyptian
1 lotus, 6 coils of rope, 7 hobbles, 9 strokes
1 × 1,000 + 6 × 100 + 7 × 10 + 9 × 1 = 1,679. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 7 vertical wedges (sixties place), 5 corner wedges + 9 vertical wedges (units place)
27 × 60 + 59 = 1679. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Happy number
- Semiprime
- Harshad (Niven) number
Related numbers & connections
1679 is a year in the 17th century, in the 1670s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1679, the Habeas Corpus Act required that a detained person be brought before a court, a protection widely copied since (England).
DocumentedHistoryGeography: EnglandPeriod: 1679
Law & regulation
Habeas corpus existed before 1679; the Act supplied penalties for officials who ignored it and closed the loopholes that had made it evadable. Rights without enforcement mechanisms is the problem it was written to solve.
DocumentedLaw & regulationGeography: EnglandPeriod: 1679
Common questions
Is 1679 a prime number?
No, 1679 is not prime.
What are the factors of 1679?
The factors of 1679 are 1, 23, 73, 1679.
What is 1679 in Roman numerals?
1679 in Roman numerals is MDCLXXIX. IX is subtractive: one before ten — ten minus one. Written additively it would be MDCLXXVIIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026