79
79 is a prime number and the atomic number of gold.
- Odd
- Prime
Where 79 fits
Why 79 is special
79's real-world identity is entirely down to its element — gold is one of the very few metals with a naturally occurring colour other than grey or silver.
79 is part of
Factors & digit properties
- Divisors (2)
- 1, 79
- Prime factorisation
- 79
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 79
- Binary
- 1001111
- Octal
- 117
- Hexadecimal
- 4f
- Roman numeral
- LXXIX
- Scientific notation
- 7.900 × 10^1
Other mathematical patterns
- Deficient number
- Happy number
- Lucky number (mathematical sieve)
Related numbers & connections
79 and 80 are consecutive integers.
View 80 →Nearby in a sequence
- is adjacent to80
why?
Strength 0.50, confidence "high".
Science
79 is the atomic number of gold, one of the few metals with a naturally occurring colour other than grey or silver.
DocumentedScience
Mathematics
79 is prime — the 22nd prime number.
DocumentedMathematics
Common questions
Is 79 a prime number?
Yes, 79 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 79?
The factors of 79 are 1, 79.
What is 79 in Roman numerals?
79 in Roman numerals is LXXIX.
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