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.
1897 is part of
Factors & digit properties
- Divisors (4)
- 1, 7, 271, 1897
- Prime factorisation
- 7 × 271
- Digit sum
- 25
- Digital root
- 7
Representations
- Decimal
- 1897
- Scientific notation
- 1.897 × 10^3
Roman numerals
M D C C C X C V I I
MDCCCXCVII uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 1 1 0 1 1 0 1 0 0 1
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,897
Octal
3 5 5 1
3 × 512 + 5 × 64 + 5 × 8 + 1 × 1 = 1,897
Hexadecimal
7 6 9
7 × 256 + 6 × 16 + 9 × 1 = 1,897
Read as powers of two: 1,024 + 512 + 256 + 64 + 32 + 8 + 1 = 1,897.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 9 hobbles, 7 strokes
1 × 1,000 + 8 × 100 + 9 × 10 + 7 × 1 = 1,897. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges + 1 vertical wedge (sixties place), 3 corner wedges + 7 vertical wedges (units place)
31 × 60 + 37 = 1897. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
1897 is a year in the 19th century, in the 1890s.
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
In 1897, J. J. Thomson identified the electron (England).
DocumentedScienceGeography: EnglandPeriod: 1897Thomson'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. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be MDCCCLXXXXVII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026