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Number

989

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

Arithmetic Number Consecutive Digits Deficient Number Evil Number Flippable Happy Number Palindrome Recamán's Sequence Semiprime Squarefree Year

Historical context — 989 AD

Calendar year

Year 989 (CMLXXXIX) was a common year starting on Tuesday of the Julian calendar.

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Historical context — 989 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: 53
Long year: contains 53 ISO weeks.
Started on: Thursday
January 1, 989
Ended on: Thursday
December 31, 989
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 980s
980–989
Century: 10th century
901–1000
Millennium: 1st millennium
1–1000
Years ago: 1,037
1037 years before 2026.

In other calendars

Hebrew: 4749 / 4750 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 378 / 379 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Earth zodiac:Ox
Sexagenary cycle position 26 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1532 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 367 / 368 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 981 / 982 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 911 / 910 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 26
Digit product: 648
Digital root: 8
Palindrome: Yes
Bit width: 10 bits
Flips to (rotate 180°): 686
Recamán's sequence: a(4,441) = 989
Square (n²): 978,121
Cube (n³): 967,361,669
Divisor count: 4
σ(n) — sum of divisors: 1,056
φ(n) — Euler's totient: 924
Sum of prime factors: 66

Primality

Prime factorization: 23 × 43

Nearest primes: 983 (−6) · 991 (+2)

Divisors & multiples

All divisors (4)

1 · 23 · 43 · 989

Aliquot sum (sum of proper divisors): 67

Factor pairs (a × b = 989)

1 × 989

23 × 43

First multiples

989 · 1,978 (double) · 2,967 · 3,956 · 4,945 · 5,934 · 6,923 · 7,912 · 8,901 · 9,890

Sums & aliquot sequence

As consecutive integers: 494 + 495 32 + 33 + … + 54 2 + 3 + … + 44

Aliquot sequence: 989 → 67 → 1 → 0 — terminates at zero

Representations

In words: nine hundred eighty-nine
Ordinal: 989th
Roman numeral: CMLXXXIX
Binary: 1111011101
Octal: 1735
Hexadecimal: 0x3DD
Base64: A90=
One's complement: 64,546 (16-bit)

In other bases

ternary (3) 1100122

quaternary (4) 33131

quinary (5) 12424

senary (6) 4325

septenary (7) 2612

nonary (9) 1318

undecimal (11) 81a

duodecimal (12) 6a5

tridecimal (13) 5b1

tetradecimal (14) 509

pentadecimal (15) 45e

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ϡπθʹ
Mayan (base 20): 𝋢·𝋩·𝋩
Chinese: 九百八十九
Chinese (financial): 玖佰捌拾玖

In other modern scripts

Eastern Arabic ٩٨٩ Devanagari ९८९ Bengali ৯৮৯ Tamil ௯௮௯ Thai ๙๘๙ Tibetan ༩༨༩ Khmer ៩៨៩ Lao ໙໘໙ Burmese ၉၈၉

Digit at this position in famous constants

π — Pi (π): Digit 989 = 9
e — Euler's number (e): Digit 989 = 6
φ — Golden ratio (φ): Digit 989 = 5
√2 — Pythagoras's (√2): Digit 989 = 8
ln 2 — Natural log of 2: Digit 989 = 7
γ — Euler-Mascheroni (γ): Digit 989 = 3

Also seen as

Unicode codepoint

ϝ

Greek Small Letter Digamma

U+03DD

Lowercase letter (Ll)

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

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

Network port

TCP/UDP port 989 is the well-known port for FTPS-DATA — FTP over TLS — data channel.

Hex color

#0003DD

RGB(0, 3, 221)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.221.

Address: 0.0.3.221
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.221

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

NANP area code 989

The number 989 is an active NANP area code (North American Numbering Plan).

Primary area: Saginaw / Bay City
Region: Michigan
Country: United States

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 989 ↗