1109
1109 is a year in the 12th century. Tripoli fell to the crusaders after a siege of seven years, completing the four crusader states (Levant).
- Odd
- Prime
Where 1109 fits
Why 1109 is special
1109 has a profile because of what happened in it rather than because of any property of the number: Tripoli fell to the crusaders after a siege of seven years, completing the four crusader states (Levant).
1109 is part of
Factors & digit properties
- Divisors (2)
- 1, 1109
- Prime factorisation
- 1109
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 1109
- Scientific notation
- 1.109 × 10^3
Roman numerals
M C I X
MCIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 0 0 0 1 0 1 0 1 0 1
1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 1,109
Octal
2 1 2 5
2 × 512 + 1 × 64 + 2 × 8 + 5 × 1 = 1,109
Hexadecimal
4 5 5
4 × 256 + 5 × 16 + 5 × 1 = 1,109
Read as powers of two: 1,024 + 64 + 16 + 4 + 1 = 1,109.
In historical numeral systems
Egyptian
1 lotus, 1 coil of rope, 9 strokes
1 × 1,000 + 1 × 100 + 9 × 1 = 1,109. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 8 vertical wedges (sixties place), 2 corner wedges + 9 vertical wedges (units place)
18 × 60 + 29 = 1109. 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
Related numbers & connections
1109 is a year in the 12th century, in the 1100s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1109, Tripoli fell to the crusaders after a siege of seven years, completing the four crusader states (Levant).
DocumentedHistoryGeography: LevantPeriod: 1109
Common questions
Is 1109 a prime number?
Yes, 1109 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1109?
The factors of 1109 are 1, 1109.
What is 1109 in Roman numerals?
1109 in Roman numerals is MCIX. IX is subtractive: one before ten — ten minus one. Written additively it would be MCVIIII, 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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026