Number
2,019
2,019 is a composite number, odd, a calendar year.
Notable events — 2019 AD
- Jan 3 China's Chang'e 4 becomes the first spacecraft to land on the far side of the Moon.
- Mar 15 A gunman kills 51 at two mosques in Christchurch, New Zealand.
- Apr 10 Astronomers release the first direct image of a black hole, captured by the Event Horizon Telescope.
- Apr 15 A fire devastates Notre-Dame Cathedral in Paris, destroying its spire.
- Apr 30 Emperor Akihito abdicates the Japanese throne, the first abdication in nearly two centuries.
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
-
Tuesday
January 1, 2019
- Ended on
-
Tuesday
December 31, 2019
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 21
Sunday, April 21, 2019
- Decade
-
2010s
2010–2019
- Century
-
21st century
2001–2100
- Millennium
-
3rd millennium
2001–3000
- Years ago
-
7
7 years before 2026.
In other calendars
- Hebrew
-
5779 / 5780 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1440 / 1441 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Pig
Sexagenary cycle position 36 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2562 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1397 / 1398 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
2011 / 2012 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1941 / 1940 Saka
Indian national calendar; year starts in March.
- Japanese
-
Reiwa 1
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 12
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 9,102
- Recamán's sequence
- a(3,713) = 2,019
- Square (n²)
- 4,076,361
- Cube (n³)
- 8,230,172,859
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,696
- φ(n) — Euler's totient
- 1,344
- Sum of prime factors
- 676
Primality
Prime factorization: 3 × 673
Divisors & multiples
Aliquot sum (sum of proper divisors):
677
First multiples
Sums & aliquot sequence
As consecutive integers:
1,009 + 1,010
672 + 673 + 674
334 + 335 + 336 + 337 + 338 + 339
Aliquot sequence:
2,019 → 677 → 1 → 0
— terminates at zero
Representations
- In words
- two thousand nineteen
- Ordinal
- 2019th
- Roman numeral
- MMXIX
- Binary
- 11111100011
- Octal
- 3743
- Hexadecimal
- 0x7E3
- Base64
- B+M=
- One's complement
- 63,516 (16-bit)
In other bases
ternary (3)
2202210
quaternary (4)
133203
quinary (5)
31034
senary (6)
13203
septenary (7)
5613
nonary (9)
2683
undecimal (11)
1576
duodecimal (12)
1203
tridecimal (13)
bc4
tetradecimal (14)
a43
pentadecimal (15)
8e9
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵βιθʹ
- Mayan (base 20)
- 𝋥·𝋠·𝋳
- Chinese
- 二千零一十九
- Chinese (financial)
- 貳仟零壹拾玖
In other modern scripts
Eastern Arabic
٢٠١٩
Devanagari
२०१९
Bengali
২০১৯
Tamil
௨௦௧௯
Thai
๒๐๑๙
Tibetan
༢༠༡༩
Khmer
២០១៩
Lao
໒໐໑໙
Burmese
၂၀၁၉
Digit at this position in famous constants
- π — Pi (π)
- Digit 2,019 = 6
- e — Euler's number (e)
- Digit 2,019 = 4
- φ — Golden ratio (φ)
- Digit 2,019 = 6
- √2 — Pythagoras's (√2)
- Digit 2,019 = 5
- ln 2 — Natural log of 2
- Digit 2,019 = 7
- γ — Euler-Mascheroni (γ)
- Digit 2,019 = 1
Also seen as
Unicode codepoint
ߣ
Nko Letter Na
U+07E3
Other letter (Lo)
UTF-8 encoding: DF A3 (2 bytes).
Hex color
#0007E3
RGB(0, 7, 227)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.227.
- Address
- 0.0.7.227
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.227
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 2019 first appears in π at position 244 of the decimal expansion (the 244ordinal-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.