Number
1,919
1,919 is a composite number, odd, a calendar year.
Notable events — 1919 AD
- Jan 16 The 18th Amendment, establishing Prohibition, is ratified.
- Apr 13 British troops fire on a crowd at Amritsar, killing hundreds.
- Jun 28 The Treaty of Versailles is signed at the Paris Peace Conference.
- Jul 19 Walter Gropius founds the Bauhaus school in Weimar (school opened April 1).
- Oct 28 The Volstead Act passes over Wilson's veto, enforcing Prohibition.
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
-
Wednesday
January 1, 1919
- Ended on
-
Wednesday
December 31, 1919
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 20
Sunday, April 20, 1919
- Decade
-
1910s
1910–1919
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
107
107 years before 2026.
In other calendars
- Hebrew
-
5679 / 5680 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1337 / 1338 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Goat
Sexagenary cycle position 56 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2462 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1297 / 1298 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1911 / 1912 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1841 / 1840 Saka
Indian national calendar; year starts in March.
- Japanese
-
Taishō 8
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 20
- Digit product
- 81
- Digital root
- 2
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 9,191
- Flips to (rotate 180°)
- 6,161
- Recamán's sequence
- a(7,906) = 1,919
- Square (n²)
- 3,682,561
- Cube (n³)
- 7,066,834,559
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,040
- φ(n) — Euler's totient
- 1,800
- Sum of prime factors
- 120
Primality
Prime factorization: 19 × 101
Divisors & multiples
Aliquot sum (sum of proper divisors):
121
First multiples
Sums & aliquot sequence
As consecutive integers:
959 + 960
92 + 93 + … + 110
32 + 33 + … + 69
Aliquot sequence:
1,919 → 121 → 12 → 16 → 15 → 9 → 4 → 3 → 1 → 0
— terminates at zero
Representations
- In words
- one thousand nine hundred nineteen
- Ordinal
- 1919th
- Roman numeral
- MCMXIX
- Binary
- 11101111111
- Octal
- 3577
- Hexadecimal
- 0x77F
- Base64
- B38=
- One's complement
- 63,616 (16-bit)
In other bases
ternary (3)
2122002
quaternary (4)
131333
quinary (5)
30134
senary (6)
12515
septenary (7)
5411
nonary (9)
2562
undecimal (11)
1495
duodecimal (12)
113b
tridecimal (13)
b48
tetradecimal (14)
9b1
pentadecimal (15)
87e
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡιθʹ
- Mayan (base 20)
- 𝋤·𝋯·𝋳
- Chinese
- 一千九百一十九
- Chinese (financial)
- 壹仟玖佰壹拾玖
In other modern scripts
Eastern Arabic
١٩١٩
Devanagari
१९१९
Bengali
১৯১৯
Tamil
௧௯௧௯
Thai
๑๙๑๙
Tibetan
༡༩༡༩
Khmer
១៩១៩
Lao
໑໙໑໙
Burmese
၁၉၁၉
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,919 = 9
- e — Euler's number (e)
- Digit 1,919 = 1
- φ — Golden ratio (φ)
- Digit 1,919 = 1
- √2 — Pythagoras's (√2)
- Digit 1,919 = 7
- ln 2 — Natural log of 2
- Digit 1,919 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,919 = 7
Also seen as
Unicode codepoint
ݿ
Arabic Letter Kaf With Two Dots Above
U+077F
Other letter (Lo)
UTF-8 encoding: DD BF (2 bytes).
Hex color
#00077F
RGB(0, 7, 127)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.127.
- Address
- 0.0.7.127
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.127
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 1919 first appears in π at position 14,508 of the decimal expansion (the 14,508ordinal-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.