Number
1,983
1,983 is a composite number, odd, a calendar year.
Notable events — 1983 AD
- Jan 1 ARPANET migrates to TCP/IP, considered the birth of the modern Internet.
- Mar 23 President Reagan proposes the Strategic Defense Initiative ("Star Wars").
- Apr 18 A suicide bomber attacks the US embassy in Beirut, killing 63.
- Sep 1 Soviet fighters shoot down Korean Air Lines Flight 007; all 269 aboard die.
- Oct 23 Bombings of the US Marine and French paratrooper barracks in Beirut kill 307.
- Oct 25 US forces invade Grenada to depose a leftist government.
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
-
Saturday
January 1, 1983
- Ended on
-
Saturday
December 31, 1983
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 3
Sunday, April 3, 1983
- Decade
-
1980s
1980–1989
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
43
43 years before 2026.
In other calendars
- Hebrew
-
5743 / 5744 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1403 / 1404 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
-
2526 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1361 / 1362 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1975 / 1976 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1905 / 1904 Saka
Indian national calendar; year starts in March.
- Japanese
-
Shōwa 58
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 21
- Digit product
- 216
- Digital root
- 3
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 3,891
- Recamán's sequence
- a(3,785) = 1,983
- Square (n²)
- 3,932,289
- Cube (n³)
- 7,797,729,087
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,648
- φ(n) — Euler's totient
- 1,320
- Sum of prime factors
- 664
Primality
Prime factorization: 3 × 661
Divisors & multiples
Aliquot sum (sum of proper divisors):
665
First multiples
Sums & aliquot sequence
As consecutive integers:
991 + 992
660 + 661 + 662
328 + 329 + 330 + 331 + 332 + 333
Aliquot sequence:
1,983 → 665 → 295 → 65 → 19 → 1 → 0
— terminates at zero
Representations
- In words
- one thousand nine hundred eighty-three
- Ordinal
- 1983rd
- Roman numeral
- MCMLXXXIII
- Binary
- 11110111111
- Octal
- 3677
- Hexadecimal
- 0x7BF
- Base64
- B78=
- One's complement
- 63,552 (16-bit)
In other bases
ternary (3)
2201110
quaternary (4)
132333
quinary (5)
30413
senary (6)
13103
septenary (7)
5532
nonary (9)
2643
undecimal (11)
1543
duodecimal (12)
1193
tridecimal (13)
b97
tetradecimal (14)
a19
pentadecimal (15)
8c3
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡπγʹ
- Mayan (base 20)
- 𝋤·𝋳·𝋣
- Chinese
- 一千九百八十三
- Chinese (financial)
- 壹仟玖佰捌拾參
In other modern scripts
Eastern Arabic
١٩٨٣
Devanagari
१९८३
Bengali
১৯৮৩
Tamil
௧௯௮௩
Thai
๑๙๘๓
Tibetan
༡༩༨༣
Khmer
១៩៨៣
Lao
໑໙໘໓
Burmese
၁၉၈၃
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,983 = 9
- e — Euler's number (e)
- Digit 1,983 = 2
- φ — Golden ratio (φ)
- Digit 1,983 = 7
- √2 — Pythagoras's (√2)
- Digit 1,983 = 7
- ln 2 — Natural log of 2
- Digit 1,983 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,983 = 4
Also seen as
Hex color
#0007BF
RGB(0, 7, 191)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.191.
- Address
- 0.0.7.191
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.191
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 1983 first appears in π at position 2,821 of the decimal expansion (the 2,821ordinal-suffix:st 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.