1,863
1,863 is a composite number, odd, a calendar year.
Notable events — 1863 AD
- Jan 1 The Emancipation Proclamation takes effect.
- Jul 3 The Battle of Gettysburg ends in Union victory.
- Jul 4 Vicksburg falls, giving the Union control of the Mississippi.
- Nov 19 Lincoln delivers the Gettysburg Address.
- Jan 10 London's Metropolitan line opens as the world's first underground railway.
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, 1863
- Ended on
-
Thursday
December 31, 1863
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Easter Sunday
-
April 5
Sunday, April 5, 1863
- Decade
-
1860s
1860–1869
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
163
163 years before 2026.
In other calendars
- Hebrew
-
5623 / 5624 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1279 / 1280 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Pig
Sexagenary cycle position 60 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2406 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1241 / 1242 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1855 / 1856 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1785 / 1784 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 18
- Digit product
- 144
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 3,681
- Recamán's sequence
- a(8,018) = 1,863
- Square (n²)
- 3,470,769
- Cube (n³)
- 6,466,042,647
- Divisor count
- 10
- σ(n) — sum of divisors
- 2,904
- φ(n) — Euler's totient
- 1,188
- Sum of prime factors
- 35
Primality
Prime factorization: 3 4 × 23
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eight hundred sixty-three
- Ordinal
- 1863rd
- Roman numeral
- MDCCCLXIII
- Binary
- 11101000111
- Octal
- 3507
- Hexadecimal
- 0x747
- Base64
- B0c=
- One's complement
- 63,672 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵αωξγʹ
- Mayan (base 20)
- 𝋤·𝋭·𝋣
- Chinese
- 一千八百六十三
- Chinese (financial)
- 壹仟捌佰陸拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,863 = 8
- e — Euler's number (e)
- Digit 1,863 = 3
- φ — Golden ratio (φ)
- Digit 1,863 = 9
- √2 — Pythagoras's (√2)
- Digit 1,863 = 3
- ln 2 — Natural log of 2
- Digit 1,863 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,863 = 8
Also seen as
UTF-8 encoding: DD 87 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.71.
- Address
- 0.0.7.71
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.71
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 1863 first appears in π at position 1,897 of the decimal expansion (the 1,897ordinal-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.