443
443 is a prime, odd, a calendar year.
Historical context — 443 AD
Calendar year
Year 443 (CDXLIII) was a common year starting on Friday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
Historical context — 443 BC
Calendar year
Year 443 BC was a year of the pre-Julian Roman calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
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, 443
- Ended on
-
Thursday
December 31, 443
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
440s
440–449
- Century
-
5th century
401–500
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,583
1583 years before 2026.
In other calendars
- Hebrew
-
4203 / 4204 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Water zodiac:Goat
Sexagenary cycle position 20 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
986 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
435 / 436 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
365 / 364 Saka
Indian national calendar; year starts in March.
Properties
Primality
443 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- four hundred forty-three
- Ordinal
- 443rd
- Roman numeral
- CDXLIII
- Binary
- 110111011
- Octal
- 673
- Hexadecimal
- 0x1BB
- Base64
- Abs=
- One's complement
- 65,092 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- υμγʹ
- Mayan (base 20)
- 𝋡·𝋢·𝋣
- Chinese
- 四百四十三
- Chinese (financial)
- 肆佰肆拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 443 = 1
- e — Euler's number (e)
- Digit 443 = 0
- φ — Golden ratio (φ)
- Digit 443 = 1
- √2 — Pythagoras's (√2)
- Digit 443 = 8
- ln 2 — Natural log of 2
- Digit 443 = 0
- γ — Euler-Mascheroni (γ)
- Digit 443 = 1
Also seen as
UTF-8 encoding: C6 BB (2 bytes).
TCP/UDP port 443 is the well-known port for HTTPS — HTTP over TLS — encrypted web traffic.
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.187.
- Address
- 0.0.1.187
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.1.187
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 443 is an active NANP area code (North American Numbering Plan).
- Primary area
- Baltimore
- Region
- Maryland
- Country
- United States
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.