2013
2013 is the year of the Snowden disclosures.
- Odd
- Composite
Where 2013 fits
Why 2013 is special
Documents describing the scale of state surveillance programmes prompted encryption to be adopted by default across much of the web. The share of web traffic that is encrypted rose from a minority to almost all of it within a few years.
Same number, different meanings
How 2013 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Documents describing the scale of state surveillance programmes prompted encryption to be adopted by default across much of the web. The share of web traffic that is encrypted rose from a minority to almost all of it within a few years.
- Science
In 2013, the Higgs boson discovery announced the previous year was confirmed, and the Nobel Prize in Physics followed (Switzerland).
- Technology & computing
The Snowden disclosures described state surveillance at a scale that prompted the web to adopt encryption by default. The share of traffic encrypted went from a minority to nearly all of it within a few years, which is the most measurable consequence.
2013 is part of
Factors & digit properties
- Divisors (8)
- 1, 3, 11, 33, 61, 183, 671, 2013
- Prime factorisation
- 3 × 11 × 61
- Digit sum
- 6
- Digital root
- 6
Representations
- Decimal
- 2013
- Scientific notation
- 2.013 × 10^3
Roman numerals
M M X I I I
Binary
1 1 1 1 1 0 1 1 1 0 1
1 × 1,024 + 1 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 2,013
Octal
3 7 3 5
3 × 512 + 7 × 64 + 3 × 8 + 5 × 1 = 2,013
Hexadecimal
7 d d
7 × 256 + d × 16 + d × 1 = 2,013
Read as powers of two: 1,024 + 512 + 256 + 128 + 64 + 16 + 8 + 4 + 1 = 2,013.
In historical numeral systems
Egyptian
2 lotuses, 1 hobble, 3 strokes
2 × 1,000 + 1 × 10 + 3 × 1 = 2,013. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges + 3 vertical wedges (sixties place), 3 corner wedges + 3 vertical wedges (units place)
33 × 60 + 33 = 2013. 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
Related numbers & connections
2013 is a year in the 21st century, in the 2010s.
Encryption became the web's default after 2013; generative AI reached mainstream use a decade later. Both are cases of a technology moving from specialist to universal within a few years.
View 2023 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Science
In 2013, the Higgs boson discovery announced the previous year was confirmed, and the Nobel Prize in Physics followed (Switzerland).
DocumentedScienceGeography: SwitzerlandPeriod: 2013
Technology & computing
The Snowden disclosures described state surveillance at a scale that prompted the web to adopt encryption by default. The share of traffic encrypted went from a minority to nearly all of it within a few years, which is the most measurable consequence.
DocumentedTechnology & computingPeriod: 2013
Common questions
Is 2013 a prime number?
No, 2013 is not prime.
What are the factors of 2013?
The factors of 2013 are 1, 3, 11, 33, 61, 183, 671, 2013.
What is 2013 in Roman numerals?
2013 in Roman numerals is MMXIII.
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