Number

493

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

Arithmetic Number Deficient Number Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 493 AD

Calendar year

Year 493 (CDXCIII) was a common year starting on Friday of the Julian calendar.

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Historical context — 493 BC

Calendar year

Year 493 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: 53
Long year: contains 53 ISO weeks.
Started on: Thursday
January 1, 493
Ended on: Thursday
December 31, 493
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 490s
490–499
Century: 5th century
401–500
Millennium: 1st millennium
1–1000
Years ago: 1,533
1533 years before 2026.

In other calendars

Hebrew: 4253 / 4254 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Water zodiac:Rooster
Sexagenary cycle position 10 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1036 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 485 / 486 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 415 / 414 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 16
Digit product: 108
Digital root: 7
Palindrome: No
Bit width: 9 bits
Reversed: 394
Recamán's sequence: a(226) = 493
Square (n²): 243,049
Cube (n³): 119,823,157
Divisor count: 4
σ(n) — sum of divisors: 540
φ(n) — Euler's totient: 448
Sum of prime factors: 46

Primality

Prime factorization: 17 × 29

Nearest primes: 491 (−2) · 499 (+6)

Divisors & multiples

All divisors (4)

1 · 17 · 29 · 493

Aliquot sum (sum of proper divisors): 47

Factor pairs (a × b = 493)

1 × 493

17 × 29

First multiples

493 · 986 (double) · 1,479 · 1,972 · 2,465 · 2,958 · 3,451 · 3,944 · 4,437 · 4,930

Sums & aliquot sequence

As a sum of two squares: 3² + 22² = 13² + 18²

As consecutive integers: 246 + 247 21 + 22 + … + 37 3 + 4 + … + 31

Aliquot sequence: 493 → 47 → 1 → 0 — terminates at zero

Representations

In words: four hundred ninety-three
Ordinal: 493rd
Roman numeral: CDXCIII
Binary: 111101101
Octal: 755
Hexadecimal: 0x1ED
Base64: Ae0=
One's complement: 65,042 (16-bit)

In other bases

ternary (3) 200021

quaternary (4) 13231

quinary (5) 3433

senary (6) 2141

septenary (7) 1303

nonary (9) 607

undecimal (11) 409

duodecimal (12) 351

tridecimal (13) 2bc

tetradecimal (14) 273

pentadecimal (15) 22d

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): υϟγʹ
Mayan (base 20): 𝋡·𝋤·𝋭
Chinese: 四百九十三
Chinese (financial): 肆佰玖拾參

In other modern scripts

Eastern Arabic ٤٩٣ Devanagari ४९३ Bengali ৪৯৩ Tamil ௪௯௩ Thai ๔๙๓ Tibetan ༤༩༣ Khmer ៤៩៣ Lao ໔໙໓ Burmese ၄၉၃

Digit at this position in famous constants

π — Pi (π): Digit 493 = 3
e — Euler's number (e): Digit 493 = 0
φ — Golden ratio (φ): Digit 493 = 0
√2 — Pythagoras's (√2): Digit 493 = 8
ln 2 — Natural log of 2: Digit 493 = 1
γ — Euler-Mascheroni (γ): Digit 493 = 3

Also seen as

Unicode codepoint

Latin Small Letter O With Ogonek And Macron

U+01ED

Lowercase letter (Ll)

UTF-8 encoding: C7 AD (2 bytes).

Lookup U+01ED on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0001ED

RGB(0, 1, 237)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.237.

Address: 0.0.1.237
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.237

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