Number

279

279 is a composite number, odd, a calendar year.

Ascending Digits Deficient Number Odious Number Pernicious Number Recamán's Sequence Year

Historical context — 279 AD

Calendar year

Year 279 (CCLXXIX) was a common year starting on Wednesday of the Julian calendar.

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Historical context — 279 BC

Calendar year

Year 279 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: Wednesday
January 1, 279
Ended on: Wednesday
December 31, 279
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 270s
270–279
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,747
1747 years before 2026.

In other calendars

Hebrew: 4039 / 4040 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Pig
Sexagenary cycle position 36 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 822 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 271 / 272 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 201 / 200 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 18
Digit product: 126
Digital root: 9
Palindrome: No
Bit width: 9 bits
Reversed: 972
Recamán's sequence: a(157) = 279
Square (n²): 77,841
Cube (n³): 21,717,639
Divisor count: 6
σ(n) — sum of divisors: 416
φ(n) — Euler's totient: 180
Sum of prime factors: 37

Primality

Prime factorization: 3 ² × 31

Nearest primes: 277 (−2) · 281 (+2)

Divisors & multiples

All divisors (6)

1 · 3 · 9 · 31 · 93 · 279

Aliquot sum (sum of proper divisors): 137

Factor pairs (a × b = 279)

1 × 279

3 × 93

9 × 31

First multiples

279 · 558 (double) · 837 · 1,116 · 1,395 · 1,674 · 1,953 · 2,232 · 2,511 · 2,790

Sums & aliquot sequence

As consecutive integers: 139 + 140 92 + 93 + 94 44 + 45 + 46 + 47 + 48 + 49 27 + 28 + … + 35

Aliquot sequence: 279 → 137 → 1 → 0 — terminates at zero

Representations

In words: two hundred seventy-nine
Ordinal: 279th
Roman numeral: CCLXXIX
Binary: 100010111
Octal: 427
Hexadecimal: 0x117
Base64: ARc=
One's complement: 65,256 (16-bit)

In other bases

ternary (3) 101100

quaternary (4) 10113

quinary (5) 2104

senary (6) 1143

septenary (7) 546

nonary (9) 340

undecimal (11) 234

duodecimal (12) 1b3

tridecimal (13) 186

tetradecimal (14) 15d

pentadecimal (15) 139

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): σοθʹ
Mayan (base 20): 𝋭·𝋳
Chinese: 二百七十九
Chinese (financial): 貳佰柒拾玖

In other modern scripts

Eastern Arabic ٢٧٩ Devanagari २७९ Bengali ২৭৯ Tamil ௨௭௯ Thai ๒๗๙ Tibetan ༢༧༩ Khmer ២៧៩ Lao ໒໗໙ Burmese ၂၇၉

Digit at this position in famous constants

π — Pi (π): Digit 279 = 4
e — Euler's number (e): Digit 279 = 4
φ — Golden ratio (φ): Digit 279 = 8
√2 — Pythagoras's (√2): Digit 279 = 3
ln 2 — Natural log of 2: Digit 279 = 5
γ — Euler-Mascheroni (γ): Digit 279 = 8

Also seen as

Unicode codepoint

Latin Small Letter E With Dot Above

U+0117

Lowercase letter (Ll)

UTF-8 encoding: C4 97 (2 bytes).

Lookup U+0117 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000117

RGB(0, 1, 23)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.23.

Address: 0.0.1.23
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.23

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