Number

609

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

Arithmetic Number Deficient Number Evil Number Flippable Recamán's Sequence Sphenic Number Squarefree Strobogrammatic Year

Historical context — 609 AD

Calendar year

Year 609 (DCIX) was a common year starting on Wednesday of the Julian calendar.

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Historical context — 609 BC

Calendar year

The year 609 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, 609
Ended on: Sunday
December 31, 609
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 600s
600–609
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,417
1417 years before 2026.

In other calendars

Hebrew: 4369 / 4370 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Snake
Sexagenary cycle position 6 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1152 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 601 / 602 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 531 / 530 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 15
Digit product: 0
Digital root: 6
Palindrome: No
Bit width: 10 bits
Reversed: 906
Recamán's sequence: a(1,041) = 609
Square (n²): 370,881
Cube (n³): 225,866,529
Divisor count: 8
σ(n) — sum of divisors: 960
φ(n) — Euler's totient: 336
Sum of prime factors: 39

Primality

Prime factorization: 3 × 7 × 29

Nearest primes: 607 (−2) · 613 (+4)

Divisors & multiples

All divisors (8)

1 · 3 · 7 · 21 · 29 · 87 · 203 · 609

Aliquot sum (sum of proper divisors): 351

Factor pairs (a × b = 609)

1 × 609

3 × 203

7 × 87

21 × 29

First multiples

609 · 1,218 (double) · 1,827 · 2,436 · 3,045 · 3,654 · 4,263 · 4,872 · 5,481 · 6,090

Sums & aliquot sequence

As consecutive integers: 304 + 305 202 + 203 + 204 99 + 100 + 101 + 102 + 103 + 104 84 + 85 + … + 90

Aliquot sequence: 609 → 351 → 209 → 31 → 1 → 0 — terminates at zero

Representations

In words: six hundred nine
Ordinal: 609th
Roman numeral: DCIX
Binary: 1001100001
Octal: 1141
Hexadecimal: 0x261
Base64: AmE=
One's complement: 64,926 (16-bit)

In other bases

ternary (3) 211120

quaternary (4) 21201

quinary (5) 4414

senary (6) 2453

septenary (7) 1530

nonary (9) 746

undecimal (11) 504

duodecimal (12) 429

tridecimal (13) 37b

tetradecimal (14) 317

pentadecimal (15) 2a9

Historical numeral systems

Babylonian (base 60): 𒌋 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): χθʹ
Mayan (base 20): 𝋡·𝋪·𝋩
Chinese: 六百零九
Chinese (financial): 陸佰零玖

In other modern scripts

Eastern Arabic ٦٠٩ Devanagari ६०९ Bengali ৬০৯ Tamil ௬௦௯ Thai ๖๐๙ Tibetan ༦༠༩ Khmer ៦០៩ Lao ໖໐໙ Burmese ၆၀၉

Digit at this position in famous constants

π — Pi (π): Digit 609 = 2
e — Euler's number (e): Digit 609 = 9
φ — Golden ratio (φ): Digit 609 = 8
√2 — Pythagoras's (√2): Digit 609 = 9
ln 2 — Natural log of 2: Digit 609 = 7
γ — Euler-Mascheroni (γ): Digit 609 = 1

Also seen as

Unicode codepoint

Latin Small Letter Script G

U+0261

Lowercase letter (Ll)

UTF-8 encoding: C9 A1 (2 bytes).

Lookup U+0261 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000261

RGB(0, 2, 97)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.97.

Address: 0.0.2.97
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.97

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

NANP area code 609

The number 609 is an active NANP area code (North American Numbering Plan).

Primary area: Trenton / Atlantic City
Region: New Jersey
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 609 ↗