867
867 is a composite number, odd, a calendar year.
867 (eight hundred sixty-seven) is an odd 3-digit number. It is a composite number with 6 divisors, and factors as 3 × 17². Written other ways, in Roman numerals it is DCCCLXVII and in binary, 1101100011.
Interestingness
Historical context — 867 AD
Calendar year
Year 867 (DCCCLXVII) was a common year starting on Wednesday of the Julian calendar.
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Historical context — 867 BC
Decade
This article concerns the period 869 BC – 860 BC.
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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
- 52
- Started on
-
Saturday
January 1, 867
- Ended on
-
Saturday
December 31, 867
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
860s
860–869
- Century
-
9th century
801–900
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,159
1159 years before 2026.
In other calendars
- Hebrew
-
4627 / 4628 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
252 / 253 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Fire zodiac:Pig
Sexagenary cycle position 24 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1410 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
245 / 246 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
859 / 860 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
789 / 788 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 3 × 17 2
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√867 = [29; (2, 4, 29, 4, 2, 58)]
Period length 6 — the block in parentheses repeats forever.
Representations
- In words
- eight hundred sixty-seven
- Ordinal
- 867th
- Roman numeral
- DCCCLXVII
- Binary
- 1101100011
- Octal
- 1543
- Hexadecimal
- 0x363
- Base64
- A2M=
- One's complement
- 64,668 (16-bit)
- Scientific notation
- 8.67 × 10²
- As a duration
- 867 s = 14 minutes, 27 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ωξζʹ
- Mayan (base 20)
- 𝋢·𝋣·𝋧
- Chinese
- 八百六十七
- Chinese (financial)
- 捌佰陸拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 867 = 5
- e — Euler's number (e)
- Digit 867 = 3
- φ — Golden ratio (φ)
- Digit 867 = 3
- √2 — Pythagoras's (√2)
- Digit 867 = 6
- ln 2 — Natural log of 2
- Digit 867 = 1
- γ — Euler-Mascheroni (γ)
- Digit 867 = 4
Also seen as
UTF-8 encoding: CD A3 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.99.
- Address
- 0.0.3.99
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.99
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 867 is an active NANP area code (North American Numbering Plan).
- Primary area
- Statewide
- Region
- Northwest Territories, Yukon, Nunavut
- Country
- Canada
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.
Heard as a frequency, 867 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A5 (880 Hz, -26¢)
- Scientific pitch (C4 = 256 Hz): A5 (861.1 Hz, +12¢)
- Baroque pitch (A4 = 415 Hz): A♯5 (879.4 Hz, -24¢)
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.