1,999
1,999 is a prime, odd, a calendar year.
Notable events — 1999 AD
- Jan 1 The euro is introduced as an accounting currency in 11 European Union states.
- Mar 12 The Czech Republic, Hungary, and Poland join NATO.
- Mar 21 Bertrand Piccard and Brian Jones complete the first nonstop circumnavigation by balloon.
- Apr 20 Two students kill 13 at Columbine High School in Colorado.
- Dec 31 Boris Yeltsin resigns, leaving Vladimir Putin as acting president of Russia.
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
- 52
- Started on
-
Friday
January 1, 1999
- Ended on
-
Friday
December 31, 1999
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 4
Sunday, April 4, 1999
- Decade
-
1990s
1990–1999
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
27
27 years before 2026.
In other calendars
- Hebrew
-
5759 / 5760 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1419 / 1420 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Rabbit
Sexagenary cycle position 16 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2542 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1377 / 1378 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1991 / 1992 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1921 / 1920 Saka
Indian national calendar; year starts in March.
- Japanese
-
Heisei 11
Reign-era counting from the start of each emperor's reign.
Properties
Primality
1,999 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand nine hundred ninety-nine
- Ordinal
- 1999th
- Roman numeral
- MCMXCIX
- Binary
- 11111001111
- Octal
- 3717
- Hexadecimal
- 0x7CF
- Base64
- B88=
- One's complement
- 63,536 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡϟθʹ
- Mayan (base 20)
- 𝋤·𝋳·𝋳
- Chinese
- 一千九百九十九
- Chinese (financial)
- 壹仟玖佰玖拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,999 = 0
- e — Euler's number (e)
- Digit 1,999 = 1
- φ — Golden ratio (φ)
- Digit 1,999 = 7
- √2 — Pythagoras's (√2)
- Digit 1,999 = 0
- ln 2 — Natural log of 2
- Digit 1,999 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,999 = 1
Also seen as
UTF-8 encoding: DF 8F (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.207.
- Address
- 0.0.7.207
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.207
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 1999 first appears in π at position 11,196 of the decimal expansion (the 11,196ordinal-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.