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Number

986

986 is a composite number, even, a calendar year.

Deficient Number Descending Digits Flippable Odious Number Pernicious Number Recamán's Sequence Sphenic Number Squarefree Strobogrammatic Year

Historical context — 986 AD

Calendar year

Year 986 (CMLXXXVI) was a common year starting on Friday of the Julian calendar.

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Historical context — 986 BC

Decade

The 980s BC is a decade that lasted from 989 BC to 980 BC.

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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: Sunday
January 1, 986
Ended on: Sunday
December 31, 986
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 980s
980–989
Century: 10th century
901–1000
Millennium: 1st millennium
1–1000
Years ago: 1,040
1040 years before 2026.

In other calendars

Hebrew: 4746 / 4747 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 375 / 376 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Fire zodiac:Dog
Sexagenary cycle position 23 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1529 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 364 / 365 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 978 / 979 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 908 / 907 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 23
Digit product: 432
Digital root: 5
Palindrome: No
Bit width: 10 bits
Reversed: 689
Recamán's sequence: a(4,447) = 986
Square (n²): 972,196
Cube (n³): 958,585,256
Divisor count: 8
σ(n) — sum of divisors: 1,620
φ(n) — Euler's totient: 448
Sum of prime factors: 48

Primality

Prime factorization: 2 × 17 × 29

Nearest primes: 983 (−3) · 991 (+5)

Divisors & multiples

All divisors (8)

1 · 2 · 17 · 29 · 34 · 58 · 493 (half) · 986

Aliquot sum (sum of proper divisors): 634

Factor pairs (a × b = 986)

1 × 986

2 × 493

17 × 58

29 × 34

First multiples

986 · 1,972 (double) · 2,958 · 3,944 · 4,930 · 5,916 · 6,902 · 7,888 · 8,874 · 9,860

Sums & aliquot sequence

As a sum of two squares: 5² + 31² = 19² + 25²

As consecutive integers: 245 + 246 + 247 + 248 50 + 51 + … + 66 20 + 21 + … + 48

Aliquot sequence: 986 → 634 → 320 → 442 → 314 → 160 → 218 → 112 → 136 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: nine hundred eighty-six
Ordinal: 986th
Roman numeral: CMLXXXVI
Binary: 1111011010
Octal: 1732
Hexadecimal: 0x3DA
Base64: A9o=
One's complement: 64,549 (16-bit)

In other bases

ternary (3) 1100112

quaternary (4) 33122

quinary (5) 12421

senary (6) 4322

septenary (7) 2606

nonary (9) 1315

undecimal (11) 817

duodecimal (12) 6a2

tridecimal (13) 5ab

tetradecimal (14) 506

pentadecimal (15) 45b

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ϡπϛʹ
Mayan (base 20): 𝋢·𝋩·𝋦
Chinese: 九百八十六
Chinese (financial): 玖佰捌拾陸

In other modern scripts

Eastern Arabic ٩٨٦ Devanagari ९८६ Bengali ৯৮৬ Tamil ௯௮௬ Thai ๙๘๖ Tibetan ༩༨༦ Khmer ៩៨៦ Lao ໙໘໖ Burmese ၉၈၆

Digit at this position in famous constants

π — Pi (π): Digit 986 = 1
e — Euler's number (e): Digit 986 = 1
φ — Golden ratio (φ): Digit 986 = 7
√2 — Pythagoras's (√2): Digit 986 = 2
ln 2 — Natural log of 2: Digit 986 = 2
γ — Euler-Mascheroni (γ): Digit 986 = 6

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 986, here are decompositions:

3 + 983 = 986
19 + 967 = 986
67 + 919 = 986
79 + 907 = 986
103 + 883 = 986
109 + 877 = 986
127 + 859 = 986
157 + 829 = 986

Showing the first eight; more decompositions exist.

Unicode codepoint

Ϛ

Greek Letter Stigma

U+03DA

Uppercase letter (Lu)

UTF-8 encoding: CF 9A (2 bytes).

Lookup U+03DA on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0003DA

RGB(0, 3, 218)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.218.

Address: 0.0.3.218
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.218

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