1,819
1,819 is a composite number, odd, a calendar year.
Notable events — 1819 AD
- Feb 22 Spain cedes Florida to the United States in the Adams-Onís Treaty.
- Mar 6 McCulloch v. Maryland establishes federal supremacy and implied powers.
- May 24 The future Queen Victoria is born at Kensington Palace.
- Aug 16 British cavalry charge a reform rally at St. Peter's Field, Manchester (the Peterloo Massacre).
- Dec 14 Alabama becomes the 22nd US state.
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, 1819
- Ended on
-
Friday
December 31, 1819
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 11
Sunday, April 11, 1819
- Decade
-
1810s
1810–1819
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
207
207 years before 2026.
In other calendars
- Hebrew
-
5579 / 5580 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1234 / 1235 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
-
2362 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1197 / 1198 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1811 / 1812 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1741 / 1740 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 19
- Digit product
- 72
- Digital root
- 1
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 9,181
- Flips to (rotate 180°)
- 6,181
- Recamán's sequence
- a(461) = 1,819
- Square (n²)
- 3,308,761
- Cube (n³)
- 6,018,636,259
- Divisor count
- 4
- σ(n) — sum of divisors
- 1,944
- φ(n) — Euler's totient
- 1,696
- Sum of prime factors
- 124
Primality
Prime factorization: 17 × 107
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eight hundred nineteen
- Ordinal
- 1819th
- Roman numeral
- MDCCCXIX
- Binary
- 11100011011
- Octal
- 3433
- Hexadecimal
- 0x71B
- Base64
- Bxs=
- One's complement
- 63,716 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αωιθʹ
- Mayan (base 20)
- 𝋤·𝋪·𝋳
- Chinese
- 一千八百一十九
- Chinese (financial)
- 壹仟捌佰壹拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,819 = 0
- e — Euler's number (e)
- Digit 1,819 = 9
- φ — Golden ratio (φ)
- Digit 1,819 = 1
- √2 — Pythagoras's (√2)
- Digit 1,819 = 7
- ln 2 — Natural log of 2
- Digit 1,819 = 3
- γ — Euler-Mascheroni (γ)
- Digit 1,819 = 7
Also seen as
UTF-8 encoding: DC 9B (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.27.
- Address
- 0.0.7.27
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.27
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1819 first appears in π at position 1,225 of the decimal expansion (the 1,225ordinal-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.