Number

673

673 is a prime, odd, a calendar year.

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

Historical context — 673 AD

Calendar year

Year 673 (DCLXXIII) was a common year starting on Saturday of the Julian calendar.

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Historical context — 673 BC

Calendar year

The year 673 BC or 673 BCE 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: Wednesday
January 1, 673
Ended on: Wednesday
December 31, 673
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 670s
670–679
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,353
1353 years before 2026.

In other calendars

Hebrew: 4433 / 4434 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 53 / 54 AH
Lunar calendar; year spans differ from Gregorian.
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: 1216 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 51 / 52 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 665 / 666 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 595 / 594 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 16
Digit product: 126
Digital root: 7
Palindrome: No
Bit width: 10 bits
Reversed: 376
Recamán's sequence: a(2,278) = 673
Square (n²): 452,929
Cube (n³): 304,821,217
Divisor count: 2
σ(n) — sum of divisors: 674
φ(n) — Euler's totient: 672

Primality

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

Divisors & multiples

All divisors (2)

1 · 673

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 673)

1 × 673

First multiples

673 · 1,346 (double) · 2,019 · 2,692 · 3,365 · 4,038 · 4,711 · 5,384 · 6,057 · 6,730

Sums & aliquot sequence

As a sum of two squares: 12² + 23²

As consecutive integers: 336 + 337

Representations

In words: six hundred seventy-three
Ordinal: 673rd
Roman numeral: DCLXXIII
Binary: 1010100001
Octal: 1241
Hexadecimal: 0x2A1
Base64: AqE=
One's complement: 64,862 (16-bit)

In other bases

ternary (3) 220221

quaternary (4) 22201

quinary (5) 10143

senary (6) 3041

septenary (7) 1651

nonary (9) 827

undecimal (11) 562

duodecimal (12) 481

tridecimal (13) 3ca

tetradecimal (14) 361

pentadecimal (15) 2ed

Historical numeral systems

Babylonian (base 60): 𒌋𒁹 𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): χογʹ
Mayan (base 20): 𝋡·𝋭·𝋭
Chinese: 六百七十三
Chinese (financial): 陸佰柒拾參

In other modern scripts

Eastern Arabic ٦٧٣ Devanagari ६७३ Bengali ৬৭৩ Tamil ௬௭௩ Thai ๖๗๓ Tibetan ༦༧༣ Khmer ៦៧៣ Lao ໖໗໓ Burmese ၆၇၃

Digit at this position in famous constants

π — Pi (π): Digit 673 = 6
e — Euler's number (e): Digit 673 = 5
φ — Golden ratio (φ): Digit 673 = 2
√2 — Pythagoras's (√2): Digit 673 = 8
ln 2 — Natural log of 2: Digit 673 = 5
γ — Euler-Mascheroni (γ): Digit 673 = 1

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 661 (gap of 12)
Next prime: 677 (gap of 4)

Pair status: cousin with 677.

Unicode codepoint

Latin Letter Glottal Stop With Stroke

U+02A1

Lowercase letter (Ll)

UTF-8 encoding: CA A1 (2 bytes).

Lookup U+02A1 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0002A1

RGB(0, 2, 161)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.161.

Address: 0.0.2.161
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.161

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

Possible US bank routing number

This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.

Routing number

000000673

Federal Reserve

United States Government

Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.

Look up on FedACH (official) ↗ Search Google for routing number 000000673 ↗