Numberwise

1716

1716 is the year the first practical diving bell with replenished air was demonstrated.

2 confirmed records · 2 sourcesChecked and sourcedChecked, general knowledgeHow we qualify claimsReport a correction

Where 1716 fits

Where 1716 fits: History, Related numbersHistory: Historical years. Related numbers: 1758, 1624.HistoryHistorical yearsRelated numbers175816241716
1716 connects to 2 worlds: history, related numbers.

Why 1716 is special

Halley's design sent weighted barrels of air down to the bell, allowing hours underwater rather than minutes. The same problem — supplying air at depth — defines diving technology ever since.

1716 is part of

Numbers around us

Factors & digit properties

Divisors (24)
1, 2, 3, 4, 6, 11, 12, 13, 22, 26, 33, 39, 44, 52, 66, 78, 132, 143, 156, 286, 429, 572, 858, 1716
Prime factorisation
2^2 × 3 × 11 × 13
Digit sum
15
Digital root
6

Representations

Decimal
1716
Scientific notation
1.716 × 10^3

Roman numerals

M D C C X V I

Binary

1 1 0 1 0 1 1 0 1 0 0

1 × 1,024 + 1 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,716

Octal

3 2 6 4

3 × 512 + 2 × 64 + 6 × 8 + 4 × 1 = 1,716

Hexadecimal

6 b 4

6 × 256 + b × 16 + 4 × 1 = 1,716

Read as powers of two: 1,024 + 512 + 128 + 32 + 16 + 4 = 1,716.

In historical numeral systems

Egyptian

1 lotus, 7 coils of rope, 1 hobble, 6 strokes

1 × 1,000 + 7 × 100 + 1 × 10 + 6 × 1 = 1,716. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.

Babylonian

2 corner wedges + 8 vertical wedges (sixties place), 3 corner wedges + 6 vertical wedges (units place)

28 × 60 + 36 = 1716. 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

  • Abundant number

Related numbers & connections

Documented appearance
1716 is a year in the 18th century, in the 1710s.

1716 is a year in the 18th century, in the 1710s.

Connection
Halley designed a resupplied diving bell in 1716 and predicted the comet's 1758 return. Both are applications of the same willingness to work out a system's behaviour in advance.

Halley designed a resupplied diving bell in 1716 and predicted the comet's 1758 return. Both are applications of the same willingness to work out a system's behaviour in advance.

View 1758 →

Numbers Around Us

  • appears inHistorical years
    why?

    Strength 0.50, confidence "high".

Other connections

  • developed from1758
    why?

    Strength 0.50, confidence "high".

  • is associated with1624
    why?

    Strength 0.50, confidence "high".

How is 1716 connected to another number? →

Technology & computing

  • In 1716, the Eddystone Lighthouse's second tower was completed, an early attempt at a light on an open rock (England).

    DocumentedTechnology & computingGeography: EnglandPeriod: 1716

  • Halley's 1716 diving bell was resupplied by weighted barrels lowered from the surface, extending working time from minutes to hours. Every later development addresses the same constraint.

    DocumentedTechnology & computingGeography: EnglandPeriod: 1716

Common questions

Is 1716 a prime number?

No, 1716 is not prime.

What are the factors of 1716?

The factors of 1716 are 1, 2, 3, 4, 6, 11, 12, 13, 22, 26, 33, 39, 44, 52, 66, 78, 132, 143, 156, 286, 429, 572, 858, 1716.

What is 1716 in Roman numerals?

1716 in Roman numerals is MDCCXVI.

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