1,019
1,019 is a prime, odd, a calendar year.
1,019 (one thousand nineteen) is an odd 4-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in Roman numerals it is MXIX and in binary, 1111111011.
Interestingness
Historical context — 1019 AD
Calendar year
Year 1019 (MXIX) was a common year starting on Thursday 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
-
Friday
January 1, 1019
- Ended on
-
Friday
December 31, 1019
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1010s
1010–1019
- Century
-
11th century
1001–1100
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
1,007
1007 years before 2026.
In other calendars
- Hebrew
-
4779 / 4780 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
409 / 410 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Goat
Sexagenary cycle position 56 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1562 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
397 / 398 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1011 / 1012 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
941 / 940 Saka
Indian national calendar; year starts in March.
Properties
Primality
1,019 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,019 = [31; (1, 11, 1, 3, 1, 1, 1, 3, 8, 1, 5, 2, 31, 2, 5, 1, 8, 3, 1, 1, 1, 3, 1, 11, …)]
Period length 26 — the block in parentheses repeats forever.
Representations
- In words
- one thousand nineteen
- Ordinal
- 1019th
- Roman numeral
- MXIX
- Binary
- 1111111011
- Octal
- 1773
- Hexadecimal
- 0x3FB
- Base64
- A/s=
- One's complement
- 64,516 (16-bit)
- Scientific notation
- 1.019 × 10³
- As a duration
- 1,019 s = 16 minutes, 59 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αιθʹ
- Mayan (base 20)
- 𝋢·𝋪·𝋳
- Chinese
- 一千零一十九
- Chinese (financial)
- 壹仟零壹拾玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,019 = 8
- e — Euler's number (e)
- Digit 1,019 = 3
- φ — Golden ratio (φ)
- Digit 1,019 = 0
- √2 — Pythagoras's (√2)
- Digit 1,019 = 2
- ln 2 — Natural log of 2
- Digit 1,019 = 7
- γ — Euler-Mascheroni (γ)
- Digit 1,019 = 4
Also seen as
UTF-8 encoding: CF BB (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.251.
- Address
- 0.0.3.251
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.251
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,019 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C6 (1046.5 Hz, -46¢ — about midway to B5)
- Scientific pitch (C4 = 256 Hz): C6 (1024 Hz, -8¢)
- Baroque pitch (A4 = 415 Hz): C♯6 (1045.7 Hz, -45¢ — about midway to C6)
The digit sequence 1019 first appears in π at position 15,482 of the decimal expansion (the 15,482ordinal-suffix:nd 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.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.