1,089
1,089 is a composite number, odd, a calendar year.
Historical context — 1089 AD
Calendar year
Year 1089 (MLXXXIX) was a common year starting on Monday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
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
-
Tuesday
January 1, 1089
- Ended on
-
Tuesday
December 31, 1089
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1080s
1080–1089
- Century
-
11th century
1001–1100
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
937
937 years before 2026.
In other calendars
- Hebrew
-
4849 / 4850 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
481 / 482 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Snake
Sexagenary cycle position 6 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1632 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
467 / 468 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1081 / 1082 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1011 / 1010 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 9,801
- Flips to (rotate 180°)
- 6,801
- Recamán's sequence
- a(4,241) = 1,089
- Square (n²)
- 1,185,921
- Cube (n³)
- 1,291,467,969
- Square root (√n)
- 33
- Divisor count
- 9
- σ(n) — sum of divisors
- 1,729
- φ(n) — Euler's totient
- 660
- Sum of prime factors
- 28
Primality
Prime factorization: 3 2 × 11 2
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eighty-nine
- Ordinal
- 1089th
- Roman numeral
- MLXXXIX
- Binary
- 10001000001
- Octal
- 2101
- Hexadecimal
- 0x441
- Base64
- BEE=
- One's complement
- 64,446 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵απθʹ
- Mayan (base 20)
- 𝋢·𝋮·𝋩
- Chinese
- 一千零八十九
- Chinese (financial)
- 壹仟零捌拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,089 = 7
- e — Euler's number (e)
- Digit 1,089 = 9
- φ — Golden ratio (φ)
- Digit 1,089 = 0
- √2 — Pythagoras's (√2)
- Digit 1,089 = 0
- ln 2 — Natural log of 2
- Digit 1,089 = 4
- γ — Euler-Mascheroni (γ)
- Digit 1,089 = 8
Also seen as
UTF-8 encoding: D1 81 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.65.
- Address
- 0.0.4.65
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.65
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1089 first appears in π at position 2,534 of the decimal expansion (the 2,534ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.