917
The Porsche 917 is the car that won Le Mans and was then effectively banned.
- Odd
- Composite
Where 917 fits
Why 917 is special
Its 5-litre engine produced enough speed on the Mulsanne straight that organisers changed the rules and later added chicanes. Regulation followed capability rather than the other way round.
917 is part of
Factors & digit properties
- Divisors (4)
- 1, 7, 131, 917
- Prime factorisation
- 7 × 131
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 917
- Binary
- 1110010101
- Octal
- 1625
- Hexadecimal
- 395
- Roman numeral
- CMXVII
- Scientific notation
- 9.170 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
The Porsche 917 is a manufacturer model number, an identifier that became the name people use for the car.
The 917 was fast enough that Le Mans changed its rules, and the 959 was built for a rally category abolished before it could compete. Both were shaped by regulation more than by engineering.
View 959 →Numbers Around Us
- appears inNumbers assigned as identifiers
why?
Strength 0.50, confidence "high".
Other connections
- contrasts with959
why?
Strength 0.50, confidence "high".
Sport
The 917 reached speeds on the Le Mans straight that led directly to engine limits and, eventually, chicanes on the circuit. The car altered the track it raced on.
DocumentedSportGeography: Germany and FrancePeriod: 1969–1971
Common questions
Is 917 a prime number?
No, 917 is not prime.
What are the factors of 917?
The factors of 917 are 1, 7, 131, 917.
What is 917 in Roman numerals?
917 in Roman numerals is CMXVII.
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: 3 August 2026