1977
1977 is the year the Apple II shipped and the Voyager probes launched.
- Odd
- Composite
Where 1977 fits
Why 1977 is special
The Apple II brought colour graphics and expansion slots to a consumer machine. Voyager 1 and 2 are still transmitting from interstellar space nearly fifty years later, running on computers far weaker than the Apple II.
Factors & digit properties
- Divisors (4)
- 1, 3, 659, 1977
- Prime factorisation
- 3 × 659
- Digit sum
- 24
- Digital root
- 6
Representations
- Decimal
- 1977
- Binary
- 11110111001
- Octal
- 3671
- Hexadecimal
- 7b9
- Roman numeral
- MCMLXXVII
- Scientific notation
- 1.977 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
The Apple II and the IBM PC, four years apart. The first proved there was a home market and the second made it an industry with interchangeable parts.
View 1981 →Numbers Around Us
- appears alongside1981
why?
Strength 0.50, confidence "high".
Science
Voyager 1 and 2 launched in 1977 and are still sending data from interstellar space, running computers far less capable than the Apple II that shipped the same year. Nothing else built in 1977 is still operating at that distance.
DocumentedSciencePeriod: 1977
Common questions
Is 1977 a prime number?
No, 1977 is not prime.
What are the factors of 1977?
The factors of 1977 are 1, 3, 659, 1977.
What is 1977 in Roman numerals?
1977 in Roman numerals is MCMLXXVII.
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