Number

694

694 is a composite number, even, a calendar year.

Arithmetic Number Deficient Number Evil Number Happy Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 694 AD

Calendar year

Year 694 (DCXCIV) was a common year starting on Thursday of the Julian calendar.

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Historical context — 694 BC

Decade

This article concerns the period 699 BC – 690 BC.

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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: Monday
January 1, 694
Ended on: Monday
December 31, 694
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 690s
690–699
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,332
1332 years before 2026.

In other calendars

Hebrew: 4454 / 4455 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 74 / 75 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Wood zodiac:Horse
Sexagenary cycle position 31 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1237 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 72 / 73 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 686 / 687 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 616 / 615 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 19
Digit product: 216
Digital root: 1
Palindrome: No
Bit width: 10 bits
Reversed: 496
Recamán's sequence: a(2,236) = 694
Square (n²): 481,636
Cube (n³): 334,255,384
Divisor count: 4
σ(n) — sum of divisors: 1,044
φ(n) — Euler's totient: 346
Sum of prime factors: 349

Primality

Prime factorization: 2 × 347

Nearest primes: 691 (−3) · 701 (+7)

Divisors & multiples

All divisors (4)

1 · 2 · 347 (half) · 694

Aliquot sum (sum of proper divisors): 350

Factor pairs (a × b = 694)

1 × 694

2 × 347

First multiples

694 · 1,388 (double) · 2,082 · 2,776 · 3,470 · 4,164 · 4,858 · 5,552 · 6,246 · 6,940

Sums & aliquot sequence

As consecutive integers: 172 + 173 + 174 + 175

Aliquot sequence: 694 → 350 → 394 → 200 → 265 → 59 → 1 → 0 — terminates at zero

Representations

In words: six hundred ninety-four
Ordinal: 694th
Roman numeral: DCXCIV
Binary: 1010110110
Octal: 1266
Hexadecimal: 0x2B6
Base64: ArY=
One's complement: 64,841 (16-bit)

In other bases

ternary (3) 221201

quaternary (4) 22312

quinary (5) 10234

senary (6) 3114

septenary (7) 2011

nonary (9) 851

undecimal (11) 581

duodecimal (12) 49a

tridecimal (13) 415

tetradecimal (14) 378

pentadecimal (15) 314

Historical numeral systems

Babylonian (base 60): 𒌋𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
Greek (Milesian): χϟδʹ
Mayan (base 20): 𝋡·𝋮·𝋮
Chinese: 六百九十四
Chinese (financial): 陸佰玖拾肆

In other modern scripts

Eastern Arabic ٦٩٤ Devanagari ६९४ Bengali ৬৯৪ Tamil ௬௯௪ Thai ๖๙๔ Tibetan ༦༩༤ Khmer ៦៩៤ Lao ໖໙໔ Burmese ၆၉၄

Digit at this position in famous constants

π — Pi (π): Digit 694 = 9
e — Euler's number (e): Digit 694 = 9
φ — Golden ratio (φ): Digit 694 = 9
√2 — Pythagoras's (√2): Digit 694 = 8
ln 2 — Natural log of 2: Digit 694 = 5
γ — Euler-Mascheroni (γ): Digit 694 = 8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 694, here are decompositions:

3 + 691 = 694
11 + 683 = 694
17 + 677 = 694
41 + 653 = 694
47 + 647 = 694
53 + 641 = 694
101 + 593 = 694
107 + 587 = 694

Showing the first eight; more decompositions exist.

Unicode codepoint

Modifier Letter Small Capital Inverted R

U+02B6

Modifier letter (Lm)

UTF-8 encoding: CA B6 (2 bytes).

Lookup U+02B6 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0002B6

RGB(0, 2, 182)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.182.

Address: 0.0.2.182
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.182

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