711
711 is the year Muslim forces crossed into the Iberian Peninsula.
- Odd
- Composite
Where 711 fits
Why 711 is special
Most of Iberia was under Muslim rule within a decade, and some part of it remained so for 781 years. Córdoba became one of the largest and most learned cities in Europe.
Factors & digit properties
- Divisors (6)
- 1, 3, 9, 79, 237, 711
- Prime factorisation
- 3^2 × 79
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 711
- Scientific notation
- 7.110 × 10^2
Roman numerals
D C C X I
Binary
1 0 1 1 0 0 0 1 1 1
1 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 711
Octal
1 3 0 7
1 × 512 + 3 × 64 + 0 × 8 + 7 × 1 = 711
Hexadecimal
2 c 7
2 × 256 + c × 16 + 7 × 1 = 711
Read as powers of two: 512 + 128 + 64 + 4 + 2 + 1 = 711.
In historical numeral systems
Egyptian
7 coils of rope, 1 hobble, 1 stroke
7 × 100 + 1 × 10 + 1 × 1 = 711. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 1 vertical wedge (sixties place), 5 corner wedges + 1 vertical wedge (units place)
11 × 60 + 51 = 711. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
psi, then iota, then alpha, marked as a numeral
psi-iota-alpha + keraia
psi + iota + alpha written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then shin, then yod, then alef
tav-shin-yod-alef
tav (400) + shin (300) + yod (10) + alef (1) = 711, written in descending order.
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
- Harshad (Niven) number
Related numbers & connections
Muslim rule in Iberia began in 711 and ended in 1492 — 781 years, which is longer than most states have existed.
View 1492 →Other connections
- is associated with1492
why?
Strength 0.50, confidence "high".
History
Muslim rule in Iberia began in 711 and ended in 1492. Al-Andalus at its height sustained libraries and scholarship on a scale unmatched elsewhere in western Europe.
DocumentedHistoryGeography: Iberian PeninsulaPeriod: 711–1492
Common questions
Is 711 a prime number?
No, 711 is not prime.
What are the factors of 711?
The factors of 711 are 1, 3, 9, 79, 237, 711.
What is 711 in Roman numerals?
711 in Roman numerals is DCCXI.
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