1967
1967 is the year of the first human heart transplant.
- Odd
- Composite
Where 1967 fits
Why 1967 is special
Christiaan Barnard's patient lived eighteen days. Transplantation only became routinely survivable after ciclosporin arrived in the 1980s, which is why the 1967 operation is a milestone in surgery rather than in treatment.
1967 is part of
Factors & digit properties
- Divisors (4)
- 1, 7, 281, 1967
- Prime factorisation
- 7 × 281
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 1967
- Binary
- 11110101111
- Octal
- 3657
- Hexadecimal
- 7af
- Roman numeral
- MCMLXVII
- Scientific notation
- 1.967 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
- Semiprime
Related numbers & connections
The first heart transplant in 1967 and the first IVF birth in 1978 were both condemned before they worked and became routine afterwards.
View 1978 →Science
Barnard's first heart transplant patient survived eighteen days. Transplantation became routinely survivable only after ciclosporin in the 1980s, which is why 1967 is a milestone in surgical technique rather than in treatment.
DocumentedScienceGeography: South AfricaPeriod: 1967
Common questions
Is 1967 a prime number?
No, 1967 is not prime.
What are the factors of 1967?
The factors of 1967 are 1, 7, 281, 1967.
What is 1967 in Roman numerals?
1967 in Roman numerals is MCMLXVII.
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