Number

743

743 is a prime, odd, a calendar year.

Arithmetic Number Chen Prime Cousin Prime Deficient Number Descending Digits Emirp Odious Number Pernicious Number Prime Recamán's Sequence Sophie Germain Prime Squarefree Year

Historical context — 743 AD

Calendar year

Year 743 (DCCXLIII) was a common year starting on Tuesday of the Julian calendar.

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Historical context — 743 BC

Decade

This article concerns the period 749 BC – 740 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: Friday
January 1, 743
Ended on: Friday
December 31, 743
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 740s
740–749
Century: 8th century
701–800
Millennium: 1st millennium
1–1000
Years ago: 1,283
1283 years before 2026.

In other calendars

Hebrew: 4503 / 4504 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 125 / 126 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Water zodiac:Goat
Sexagenary cycle position 20 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1286 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 121 / 122 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 735 / 736 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 665 / 664 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 14
Digit product: 84
Digital root: 5
Palindrome: No
Bit width: 10 bits
Reversed: 347
Recamán's sequence: a(945) = 743
Square (n²): 552,049
Cube (n³): 410,172,407
Divisor count: 2
σ(n) — sum of divisors: 744
φ(n) — Euler's totient: 742

Primality

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

Divisors & multiples

All divisors (2)

1 · 743

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 743)

1 × 743

First multiples

743 · 1,486 (double) · 2,229 · 2,972 · 3,715 · 4,458 · 5,201 · 5,944 · 6,687 · 7,430

Sums & aliquot sequence

As consecutive integers: 371 + 372

Representations

In words: seven hundred forty-three
Ordinal: 743rd
Roman numeral: DCCXLIII
Binary: 1011100111
Octal: 1347
Hexadecimal: 0x2E7
Base64: Auc=
One's complement: 64,792 (16-bit)

In other bases

ternary (3) 1000112

quaternary (4) 23213

quinary (5) 10433

senary (6) 3235

septenary (7) 2111

nonary (9) 1015

undecimal (11) 616

duodecimal (12) 51b

tridecimal (13) 452

tetradecimal (14) 3b1

pentadecimal (15) 348

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹 𒌋𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): ψμγʹ
Mayan (base 20): 𝋡·𝋱·𝋣
Chinese: 七百四十三
Chinese (financial): 柒佰肆拾參

In other modern scripts

Eastern Arabic ٧٤٣ Devanagari ७४३ Bengali ৭৪৩ Tamil ௭௪௩ Thai ๗๔๓ Tibetan ༧༤༣ Khmer ៧៤៣ Lao ໗໔໓ Burmese ၇၄၃

Digit at this position in famous constants

π — Pi (π): Digit 743 = 7
e — Euler's number (e): Digit 743 = 7
φ — Golden ratio (φ): Digit 743 = 2
√2 — Pythagoras's (√2): Digit 743 = 7
ln 2 — Natural log of 2: Digit 743 = 9
γ — Euler-Mascheroni (γ): Digit 743 = 2

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 739 (gap of 4)
Next prime: 751 (gap of 8)

Pair status: cousin with 739.

Unicode codepoint

Modifier Letter Mid Tone Bar

U+02E7

Modifier symbol (Sk)

UTF-8 encoding: CB A7 (2 bytes).

Lookup U+02E7 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0002E7

RGB(0, 2, 231)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.231.

Address: 0.0.2.231
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.231

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

NANP area code 743

The number 743 is an active NANP area code (North American Numbering Plan).

Primary area: Greensboro
Region: North Carolina
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 743 ↗