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Number

389

389 is a prime, odd, a calendar year.

Arithmetic Number Ascending Digits Chen Prime Deficient Number Emirp Evil Number Prime Pythagorean Prime Recamán's Sequence Self Number Sexy Prime Squarefree Year

Historical context — 389 AD

Calendar year

Year 389 (CCCLXXXIX) 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 — 389 BC

Calendar year

Year 389 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: Sunday
January 1, 389
Ended on: Sunday
December 31, 389
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 380s
380–389
Century: 4th century
301–400
Millennium: 1st millennium
1–1000
Years ago: 1,637
1637 years before 2026.

In other calendars

Hebrew: 4149 / 4150 AM
Rosh Hashanah falls in September/October.
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: 932 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 381 / 382 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 311 / 310 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 20
Digit product: 216
Digital root: 2
Palindrome: No
Bit width: 9 bits
Reversed: 983
Recamán's sequence: a(2,474) = 389
Square (n²): 151,321
Cube (n³): 58,863,869
Divisor count: 2
σ(n) — sum of divisors: 390
φ(n) — Euler's totient: 388

Primality

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

Divisors & multiples

All divisors (2)

1 · 389

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 389)

1 × 389

First multiples

389 · 778 (double) · 1,167 · 1,556 · 1,945 · 2,334 · 2,723 · 3,112 · 3,501 · 3,890

Sums & aliquot sequence

As a sum of two squares: 10² + 17²

As consecutive integers: 194 + 195

Representations

In words: three hundred eighty-nine
Ordinal: 389th
Roman numeral: CCCLXXXIX
Binary: 110000101
Octal: 605
Hexadecimal: 0x185
Base64: AYU=
One's complement: 65,146 (16-bit)

In other bases

ternary (3) 112102

quaternary (4) 12011

quinary (5) 3024

senary (6) 1445

septenary (7) 1064

nonary (9) 472

undecimal (11) 324

duodecimal (12) 285

tridecimal (13) 23c

tetradecimal (14) 1db

pentadecimal (15) 1ae

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): τπθʹ
Mayan (base 20): 𝋳·𝋩
Chinese: 三百八十九
Chinese (financial): 參佰捌拾玖

In other modern scripts

Eastern Arabic ٣٨٩ Devanagari ३८९ Bengali ৩৮৯ Tamil ௩௮௯ Thai ๓๘๙ Tibetan ༣༨༩ Khmer ៣៨៩ Lao ໓໘໙ Burmese ၃၈၉

Digit at this position in famous constants

π — Pi (π): Digit 389 = 9
e — Euler's number (e): Digit 389 = 9
φ — Golden ratio (φ): Digit 389 = 2
√2 — Pythagoras's (√2): Digit 389 = 6
ln 2 — Natural log of 2: Digit 389 = 3
γ — Euler-Mascheroni (γ): Digit 389 = 5

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 383 (gap of 6)
Next prime: 397 (gap of 8)

Pair status: sexy with 383.

Unicode codepoint

ƅ

Latin Small Letter Tone Six

U+0185

Lowercase letter (Ll)

UTF-8 encoding: C6 85 (2 bytes).

Lookup U+0185 on Compart ↗ Lookup on FileFormat.Info ↗

Network port

TCP/UDP port 389 is the well-known port for LDAP — Lightweight Directory Access Protocol.

Hex color

#000185

RGB(0, 1, 133)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.133.

Address: 0.0.1.133
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.133

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