1,423
1,423 is a prime, odd, a calendar year.
Historical context — 1423 AD
Calendar year
Year 1423 (MCDXXIII) was a common year starting on Friday of the Julian calendar.
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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, 1423
- Ended on
-
Wednesday
December 31, 1423
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1420s
1420–1429
- Century
-
15th century
1401–1500
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
603
603 years before 2026.
In other calendars
- Hebrew
-
5183 / 5184 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
826 / 827 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Rabbit
Sexagenary cycle position 40 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1966 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
801 / 802 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1415 / 1416 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1345 / 1344 Saka
Indian national calendar; year starts in March.
Properties
Primality
1,423 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand four hundred twenty-three
- Ordinal
- 1423rd
- Roman numeral
- MCDXXIII
- Binary
- 10110001111
- Octal
- 2617
- Hexadecimal
- 0x58F
- Base64
- BY8=
- One's complement
- 64,112 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵αυκγʹ
- Mayan (base 20)
- 𝋣·𝋫·𝋣
- Chinese
- 一千四百二十三
- Chinese (financial)
- 壹仟肆佰貳拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,423 = 1
- e — Euler's number (e)
- Digit 1,423 = 1
- φ — Golden ratio (φ)
- Digit 1,423 = 8
- √2 — Pythagoras's (√2)
- Digit 1,423 = 9
- ln 2 — Natural log of 2
- Digit 1,423 = 8
- γ — Euler-Mascheroni (γ)
- Digit 1,423 = 5
Also seen as
UTF-8 encoding: D6 8F (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.143.
- Address
- 0.0.5.143
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.143
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 1423 first appears in π at position 9,270 of the decimal expansion (the 9,270ordinal-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.