1897
1897 is the year the electron was discovered.
- Odd
- Composite
Where 1897 fits
Why 1897 is special
J. J. Thomson showed cathode rays were particles far lighter than any atom, which meant atoms had internal structure and were not indivisible. The name atom means uncuttable, and it had been wrong for 2,300 years.
Factors & digit properties
- Divisors (4)
- 1, 7, 271, 1897
- Prime factorisation
- 7 × 271
- Digit sum
- 25
- Digital root
- 7
Representations
- Decimal
- 1897
- Binary
- 11101101001
- Octal
- 3551
- Hexadecimal
- 769
- Roman numeral
- MDCCCXCVII
- Scientific notation
- 1.897 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
X-rays in 1895 and the electron in 1897. Cathode ray tubes produced both discoveries within two years, and together they established that atoms have internal structure.
View 1895 →Science
Thomson's 1897 measurement showed a particle about two thousand times lighter than hydrogen, which meant atoms had components. The word atom had meant indivisible since the Greeks, and the discovery made the name a historical artefact.
DocumentedSciencePeriod: 1897
Common questions
Is 1897 a prime number?
No, 1897 is not prime.
What are the factors of 1897?
The factors of 1897 are 1, 7, 271, 1897.
What is 1897 in Roman numerals?
1897 in Roman numerals is MDCCCXCVII.
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