8611
K2 is 8,611 metres high.
- Odd
- Composite
Where 8611 fits
Why 8611 is special
It is 237 m lower than Everest and far more dangerous: roughly one death for every four successful summits historically, against about one in twenty on Everest. No one had reached the summit in winter until 2021.
Factors & digit properties
- Divisors (4)
- 1, 79, 109, 8611
- Prime factorisation
- 79 × 109
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 8611
- Scientific notation
- 8.611 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 0 0 0 0 1 1 0 1 0 0 0 1 1
1 × 8,192 + 0 × 4,096 + 0 × 2,048 + 0 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 8,611
Octal
2 0 6 4 3
2 × 4,096 + 0 × 512 + 6 × 64 + 4 × 8 + 3 × 1 = 8,611
Hexadecimal
2 1 a 3
2 × 4,096 + 1 × 256 + a × 16 + 3 × 1 = 8,611
Read as powers of two: 8,192 + 256 + 128 + 32 + 2 + 1 = 8,611.
In historical numeral systems
Egyptian
8 lotuses, 6 coils of rope, 1 hobble, 1 stroke
8 × 1,000 + 6 × 100 + 1 × 10 + 1 × 1 = 8,611. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
Gasherbrum II and K2 are both Karakoram peaks. The range concentrates four eight-thousanders within about twenty kilometres.
View 8035 →K2 is 237 m lower than Everest and several times deadlier. Height alone is a poor predictor of difficulty, which the pair demonstrates as clearly as any two mountains.
View 8848 →Nearby in a sequence
- is adjacent to8035
why?
Strength 0.50, confidence "high".
Geography
K2 is the second-highest mountain and has a fatality rate several times Everest's. Steeper terrain, worse weather and no straightforward route mean height alone is a poor guide to difficulty.
DocumentedGeographyGeography: Pakistan and China
Common questions
Is 8611 a prime number?
No, 8611 is not prime.
What are the factors of 8611?
The factors of 8611 are 1, 79, 109, 8611.
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