779
Jupiter orbits about 779 million km from the Sun.
- Odd
- Composite
Where 779 fits
Why 779 is special
At that distance sunlight is about four percent as intense as at Earth, which is why missions to Jupiter historically used nuclear power sources. Juno's large solar arrays were a deliberate demonstration that solar power could work that far out.
Factors & digit properties
- Divisors (4)
- 1, 19, 41, 779
- Prime factorisation
- 19 × 41
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 779
- Scientific notation
- 7.790 × 10^2
Roman numerals
D C C L X X I X
DCCLXXIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 1 0 0 0 0 1 0 1 1
1 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 779
Octal
1 4 1 3
1 × 512 + 4 × 64 + 1 × 8 + 3 × 1 = 779
Hexadecimal
3 0 b
3 × 256 + 0 × 16 + b × 1 = 779
Read as powers of two: 512 + 256 + 8 + 2 + 1 = 779.
In historical numeral systems
Egyptian
7 coils of rope, 7 hobbles, 9 strokes
7 × 100 + 7 × 10 + 9 × 1 = 779. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 2 vertical wedges (sixties place), 5 corner wedges + 9 vertical wedges (units place)
12 × 60 + 59 = 779. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
psi, then omicron, then theta, marked as a numeral
psi-omicron-theta + keraia
psi + omicron + theta 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 ayin, then tet
tav-shin-ayin-tet
tav (400) + shin (300) + ayin (70) + tet (9) = 779, 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
- Semiprime
Related numbers & connections
Saturn is roughly twice Jupiter's distance. A radio command takes about 80 minutes to reach it, which is why spacecraft there must act on stored instructions.
View 1434 →Science
Sunlight at Jupiter is about a twenty-fifth as strong as at Earth, which long made solar power impractical for outer-planet missions. Juno reached Jupiter on solar arrays in 2016, which was a demonstration as much as an engineering choice.
DocumentedScience
Common questions
Is 779 a prime number?
No, 779 is not prime.
What are the factors of 779?
The factors of 779 are 1, 19, 41, 779.
What is 779 in Roman numerals?
779 in Roman numerals is DCCLXXIX. IX is subtractive: one before ten — ten minus one. Written additively it would be DCCLXXVIIII, 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