109
Meitnerium is element 109, named after Lise Meitner.
- Odd
- Prime
Where 109 fits
Why 109 is special
Meitner explained nuclear fission in 1939 and was excluded from the Nobel Prize awarded for it. The element is the more durable correction: a name on the periodic table outlasts any prize list, and it is one of very few elements named for a woman.
109 is part of
Factors & digit properties
- Divisors (2)
- 1, 109
- Prime factorisation
- 109
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 109
- Binary
- 1101101
- Octal
- 155
- Hexadecimal
- 6d
- Roman numeral
- CIX
- Scientific notation
- 1.090 × 10^2
Other mathematical patterns
- Deficient number
- Happy number
- Twin prime
Related numbers & connections
Bohrium and meitnerium were named in the same 1997 IUPAC settlement that ended thirty years of competing American, Soviet and German discovery claims.
View 107 →Meitnerium is named for Lise Meitner, who explained the 1938 fission result and was omitted from the Nobel Prize awarded for it.
View 1938 →Science
Lise Meitner worked out what Hahn and Strassmann had observed and was left off the Nobel Prize for it. Element 109 carries her name permanently, which is a form of recognition that does not expire and cannot be re-awarded.
DocumentedScience
Common questions
Is 109 a prime number?
Yes, 109 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 109?
The factors of 109 are 1, 109.
What is 109 in Roman numerals?
109 in Roman numerals is CIX.
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