1389
1389 is the year of the Battle of Kosovo.
- Odd
- Composite
Where 1389 fits
Why 1389 is special
Both commanders died and the outcome was indecisive militarily. Its later role in Serbian national identity is enormous and largely constructed in the nineteenth century.
1389 is part of
Factors & digit properties
- Divisors (4)
- 1, 3, 463, 1389
- Prime factorisation
- 3 × 463
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 1389
- Scientific notation
- 1.389 × 10^3
Roman numerals
M C C C L X X X I X
MCCCLXXXIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 0 1 0 1 1 0 1 1 0 1
1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 1,389
Octal
2 5 5 5
2 × 512 + 5 × 64 + 5 × 8 + 5 × 1 = 1,389
Hexadecimal
5 6 d
5 × 256 + 6 × 16 + d × 1 = 1,389
Read as powers of two: 1,024 + 256 + 64 + 32 + 8 + 4 + 1 = 1,389.
In historical numeral systems
Egyptian
1 lotus, 3 coils of rope, 8 hobbles, 9 strokes
1 × 1,000 + 3 × 100 + 8 × 10 + 9 × 1 = 1,389. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 3 vertical wedges (sixties place), 9 vertical wedges (units place)
23 × 60 + 9 = 1389. 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
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
1389 is a year in the 14th century, in the 1380s.
Kosovo in 1389 and the fall of Constantinople in 1453 are both invoked in modern Balkan politics far more than their military outcomes warrant.
View 1453 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- is associated with1453
why?
Strength 0.50, confidence "high".
History
In 1389, the battle of Kosovo left both the Serbian and Ottoman rulers dead and became the central event of Serbian national memory (Balkans).
DocumentedHistoryGeography: BalkansPeriod: 1389Kosovo in 1389 killed both leaders and settled little. Its position at the centre of Serbian national memory was substantially built five centuries later, and it was invoked directly in the 1990s.
DocumentedHistoryGeography: KosovoPeriod: 1389
Common questions
Is 1389 a prime number?
No, 1389 is not prime.
What are the factors of 1389?
The factors of 1389 are 1, 3, 463, 1389.
What is 1389 in Roman numerals?
1389 in Roman numerals is MCCCLXXXIX. IX is subtractive: one before ten — ten minus one. Written additively it would be MCCCLXXXVIIII, 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