1973
1973 is the year of the oil crisis that ended the post-war era of cheap energy.
- Odd
- Prime
Where 1973 fits
Why 1973 is special
An OPEC embargo roughly quadrupled the oil price within months, producing fuel rationing and speed limits in importing countries and ending a long period of assumed-cheap energy. Much of what followed in industrial policy dates from this shock.
1973 is part of
Factors & digit properties
- Divisors (2)
- 1, 1973
- Prime factorisation
- 1973
- Digit sum
- 20
- Digital root
- 2
Representations
- Decimal
- 1973
- Binary
- 11110110101
- Octal
- 3665
- Hexadecimal
- 7b5
- Roman numeral
- MCMLXXIII
- Scientific notation
- 1.973 × 10^3
Other mathematical patterns
- Deficient number
- Sophie Germain prime
Related numbers & connections
Two oil shocks six years apart, the first from an embargo and the second from the Iranian Revolution. Together they ended the post-war assumption of cheap energy.
View 1979 →Other connections
- is associated with1979
why?
Strength 0.50, confidence "high".
Finance & economics
An OPEC embargo roughly quadrupled crude prices within months in 1973, producing rationing, reduced speed limits and sustained inflation in importing countries. Much of the industrial and energy policy that followed dates from this shock rather than from any later one.
DocumentedFinance & economicsPeriod: 1973
Common questions
Is 1973 a prime number?
Yes, 1973 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1973?
The factors of 1973 are 1, 1973.
What is 1973 in Roman numerals?
1973 in Roman numerals is MCMLXXIII.
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