1,389
1,389 is a composite number, odd, a calendar year.
Notable events — 1389 AD
- Jun 15 The Battle of Kosovo seals Ottoman dominance in the Balkans.
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, 1389
- Ended on
-
Thursday
December 31, 1389
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
1380s
1380–1389
- Century
-
14th century
1301–1400
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
637
637 years before 2026.
In other calendars
- Hebrew
-
5149 / 5150 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
790 / 792 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
-
1932 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
767 / 768 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1381 / 1382 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1311 / 1310 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 3 × 463
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand three hundred eighty-nine
- Ordinal
- 1389th
- Roman numeral
- MCCCLXXXIX
- Binary
- 10101101101
- Octal
- 2555
- Hexadecimal
- 0x56D
- Base64
- BW0=
- One's complement
- 64,146 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ατπθʹ
- Mayan (base 20)
- 𝋣·𝋩·𝋩
- Chinese
- 一千三百八十九
- Chinese (financial)
- 壹仟參佰捌拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,389 = 7
- e — Euler's number (e)
- Digit 1,389 = 0
- φ — Golden ratio (φ)
- Digit 1,389 = 1
- √2 — Pythagoras's (√2)
- Digit 1,389 = 7
- ln 2 — Natural log of 2
- Digit 1,389 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,389 = 1
Also seen as
UTF-8 encoding: D5 AD (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.109.
- Address
- 0.0.5.109
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.109
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1389 first appears in π at position 1,076 of the decimal expansion (the 1,076ordinal-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.