873
Port 873 carries rsync, a protocol for copying only what has changed.
- Odd
- Composite
Where 873 fits
Why 873 is special
rsync compares source and destination and transfers just the differing blocks, which is why mirroring a large archive over a slow link is feasible at all. Most Linux distribution mirrors are still kept in step this way.
Factors & digit properties
- Divisors (6)
- 1, 3, 9, 97, 291, 873
- Prime factorisation
- 3^2 × 97
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 873
- Scientific notation
- 8.730 × 10^2
Roman numerals
D C C C L X X I I I
Binary
1 1 0 1 1 0 1 0 0 1
1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 873
Octal
1 5 5 1
1 × 512 + 5 × 64 + 5 × 8 + 1 × 1 = 873
Hexadecimal
3 6 9
3 × 256 + 6 × 16 + 9 × 1 = 873
Read as powers of two: 512 + 256 + 64 + 32 + 8 + 1 = 873.
In historical numeral systems
Egyptian
8 coils of rope, 7 hobbles, 3 strokes
8 × 100 + 7 × 10 + 3 × 1 = 873. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 4 vertical wedges (sixties place), 3 corner wedges + 3 vertical wedges (units place)
14 × 60 + 33 = 873. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
omega, then omicron, then gamma, marked as a numeral
omega-omicron-gamma + keraia
omega + omicron + gamma 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 tav, then ayin, then gimel
tav-tav-ayin-gimel
tav (400) + tav (400) + ayin (70) + gimel (3) = 873, 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
- Lucky number (mathematical sieve)
Related numbers & connections
rsync transfers only what has changed and Subversion tracked changes centrally. Both are answers to the same question — how to move a large body of files without moving all of it — from different directions.
View 3690 →Other connections
- is associated with3690
why?
Strength 0.50, confidence "high".
Technology & computing
rsync compares both ends and sends only the blocks that differ, which is what makes mirroring a large archive over a slow link practical. Most Linux distribution mirrors are still synchronised this way.
DocumentedTechnology & computing
Common questions
Is 873 a prime number?
No, 873 is not prime.
What are the factors of 873?
The factors of 873 are 1, 3, 9, 97, 291, 873.
What is 873 in Roman numerals?
873 in Roman numerals is DCCCLXXIII.
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