133
133 is a composite number, odd, a calendar year.
133 (one hundred thirty-three) is an odd 3-digit number. It is a composite number with 4 divisors, and factors as 7 × 19. Written other ways, in Roman numerals it is CXXXIII and in binary, 10000101.
Interestingness
Historical context — 133 AD
Calendar year
Year 133 (CXXXIII) was a common year starting on Wednesday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →
Notable events — 133 BC
- Undated Tiberius Gracchus, the Roman reformer, is killed by a senatorial mob.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 133
- Ended on
-
Thursday
December 31, 133
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
130s
130–139
- Century
-
2nd century
101–200
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,893
1893 years before 2026.
In other calendars
- Hebrew
-
3893 / 3894 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Water zodiac:Rooster
Sexagenary cycle position 10 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
676 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
125 / 126 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
55 / 54 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 7 × 19
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√133 = [11; (1, 1, 7, 5, 1, 1, 1, 2, 1, 1, 1, 5, 7, 1, 1, 22)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-three
- Ordinal
- 133rd
- Roman numeral
- CXXXIII
- Binary
- 10000101
- Octal
- 205
- Hexadecimal
- 0x85
- Base64
- hQ==
- One's complement
- 122 (8-bit)
- Scientific notation
- 1.33 × 10²
- As a duration
- 133 s = 2 minutes, 13 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹 𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ρλγʹ
- Mayan (base 20)
- 𝋦·𝋭
- Chinese
- 一百三十三
- Chinese (financial)
- 壹佰參拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 133 = 0
- e — Euler's number (e)
- Digit 133 = 9
- φ — Golden ratio (φ)
- Digit 133 = 3
- √2 — Pythagoras's (√2)
- Digit 133 = 0
- ln 2 — Natural log of 2
- Digit 133 = 8
- γ — Euler-Mascheroni (γ)
- Digit 133 = 6
Also seen as
UTF-8 encoding: C2 85 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.133.
- Address
- 0.0.0.133
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.0.133
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 133 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C3 (130.8 Hz, +29¢)
- Scientific pitch (C4 = 256 Hz): C♯3 (135.6 Hz, -34¢)
- Baroque pitch (A4 = 415 Hz): C♯3 (130.7 Hz, +30¢)
On an ingredients label, E133 is Brilliant Blue FCF, a food colour.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.