Number

163

163 is a prime, odd, a calendar year.

Arithmetic Number Cousin Prime Deficient Number Evil Number Prime Recamán's Sequence Sexy Prime Squarefree Year

Historical context — 163 AD

Calendar year

Year 163 (CLXIII) was a common year starting on Friday of the Julian calendar.

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Historical context — 163 BC

Calendar year

Year 163 BC was a year of the pre-Julian Roman calendar.

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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: Saturday
January 1, 163
Ended on: Saturday
December 31, 163
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 160s
160–169
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,863
1863 years before 2026.

In other calendars

Hebrew: 3923 / 3924 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Water zodiac:Rabbit
Sexagenary cycle position 40 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 706 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 155 / 156 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 85 / 84 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 10
Digit product: 18
Digital root: 1
Palindrome: No
Bit width: 8 bits
Reversed: 361
Recamán's sequence: a(98) = 163
Square (n²): 26,569
Cube (n³): 4,330,747
Divisor count: 2
σ(n) — sum of divisors: 164
φ(n) — Euler's totient: 162

Primality

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

Divisors & multiples

All divisors (2)

1 · 163

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 163)

1 × 163

First multiples

163 · 326 (double) · 489 · 652 · 815 · 978 · 1,141 · 1,304 · 1,467 · 1,630

Sums & aliquot sequence

As consecutive integers: 81 + 82

Representations

In words: one hundred sixty-three
Ordinal: 163rd
Roman numeral: CLXIII
Binary: 10100011
Octal: 243
Hexadecimal: 0xA3
Base64: ow==
One's complement: 92 (8-bit)

In other bases

ternary (3) 20001

quaternary (4) 2203

quinary (5) 1123

senary (6) 431

septenary (7) 322

nonary (9) 201

undecimal (11) 139

duodecimal (12) 117

tridecimal (13) c7

tetradecimal (14) b9

pentadecimal (15) ad

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): ρξγʹ
Mayan (base 20): 𝋨·𝋣
Chinese: 一百六十三
Chinese (financial): 壹佰陸拾參

In other modern scripts

Eastern Arabic ١٦٣ Devanagari १६३ Bengali ১৬৩ Tamil ௧௬௩ Thai ๑๖๓ Tibetan ༡༦༣ Khmer ១៦៣ Lao ໑໖໓ Burmese ၁၆၃

Digit at this position in famous constants

π — Pi (π): Digit 163 = 4
e — Euler's number (e): Digit 163 = 2
φ — Golden ratio (φ): Digit 163 = 9
√2 — Pythagoras's (√2): Digit 163 = 2
ln 2 — Natural log of 2: Digit 163 = 7
γ — Euler-Mascheroni (γ): Digit 163 = 0

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 157 (gap of 6)
Next prime: 167 (gap of 4)

Pair status: cousin with 167, sexy with 157.

Unicode codepoint

Pound Sign

U+00A3

Currency symbol (Sc)

UTF-8 encoding: C2 A3 (2 bytes).

Lookup U+00A3 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0000A3

RGB(0, 0, 163)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.163.

Address: 0.0.0.163
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.163

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