Number

199

199 is a prime, odd, a calendar year.

Arithmetic Number Chen Prime Deficient Number Emirp Flippable Lucas Odious Number Pernicious Number Prime Recamán's Sequence Sexy Prime Squarefree Twin Prime Year

Historical context — 199 AD

Calendar year

Year 199 (CXCIX) was a common year starting on Monday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 199 BC

Calendar year

Year 199 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: 52
Started on: Tuesday
January 1, 199
Ended on: Tuesday
December 31, 199
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 190s
190–199
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,827
1827 years before 2026.

In other calendars

Hebrew: 3959 / 3960 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Rabbit
Sexagenary cycle position 16 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 742 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 191 / 192 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 121 / 120 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 19
Digit product: 81
Digital root: 1
Palindrome: No
Bit width: 8 bits
Reversed: 991
Flips to (rotate 180°): 661
Recamán's sequence: a(1,373) = 199
Square (n²): 39,601
Cube (n³): 7,880,599
Divisor count: 2
σ(n) — sum of divisors: 200
φ(n) — Euler's totient: 198

Primality

199 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 199

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 199)

1 × 199

First multiples

199 · 398 (double) · 597 · 796 · 995 · 1,194 · 1,393 · 1,592 · 1,791 · 1,990

Sums & aliquot sequence

As consecutive integers: 99 + 100

Representations

In words: one hundred ninety-nine
Ordinal: 199th
Roman numeral: CXCIX
Binary: 11000111
Octal: 307
Hexadecimal: 0xC7
Base64: xw==
One's complement: 56 (8-bit)

In other bases

ternary (3) 21101

quaternary (4) 3013

quinary (5) 1244

senary (6) 531

septenary (7) 403

nonary (9) 241

undecimal (11) 171

duodecimal (12) 147

tridecimal (13) 124

tetradecimal (14) 103

pentadecimal (15) d4

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ρϟθʹ
Mayan (base 20): 𝋩·𝋳
Chinese: 一百九十九
Chinese (financial): 壹佰玖拾玖

In other modern scripts

Eastern Arabic ١٩٩ Devanagari १९९ Bengali ১৯৯ Tamil ௧௯௯ Thai ๑๙๙ Tibetan ༡༩༩ Khmer ១៩៩ Lao ໑໙໙ Burmese ၁၉၉

Digit at this position in famous constants

π — Pi (π): Digit 199 = 1
e — Euler's number (e): Digit 199 = 9
φ — Golden ratio (φ): Digit 199 = 7
√2 — Pythagoras's (√2): Digit 199 = 1
ln 2 — Natural log of 2: Digit 199 = 3
γ — Euler-Mascheroni (γ): Digit 199 = 4

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 197 (gap of 2)
Next prime: 211 (gap of 12)

Pair status: twin with 197.

Unicode codepoint

Latin Capital Letter C With Cedilla

U+00C7

Uppercase letter (Lu)

UTF-8 encoding: C3 87 (2 bytes).

Lookup U+00C7 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0000C7

RGB(0, 0, 199)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.199.

Address: 0.0.0.199
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.199

Unspecified address (0.0.0.0/8) — "this network" placeholder.