Number

603

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

Deficient Number Evil Number Harshad / Niven Recamán's Sequence Year

Historical context — 603 AD

Calendar year

Year 603 (DCIII) was a common year starting on Tuesday of the Julian calendar.

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Historical context — 603 BC

Calendar year

The year 603 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: 52
Started on: Saturday
January 1, 603
Ended on: Saturday
December 31, 603
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 600s
600–609
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,423
1423 years before 2026.

In other calendars

Hebrew: 4363 / 4364 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Water zodiac:Pig
Sexagenary cycle position 60 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1146 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 595 / 596 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 525 / 524 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 9
Digit product: 0
Digital root: 9
Palindrome: No
Bit width: 10 bits
Reversed: 306
Recamán's sequence: a(1,053) = 603
Square (n²): 363,609
Cube (n³): 219,256,227
Divisor count: 6
σ(n) — sum of divisors: 884
φ(n) — Euler's totient: 396
Sum of prime factors: 73

Primality

Prime factorization: 3 ² × 67

Nearest primes: 601 (−2) · 607 (+4)

Divisors & multiples

All divisors (6)

1 · 3 · 9 · 67 · 201 · 603

Aliquot sum (sum of proper divisors): 281

Factor pairs (a × b = 603)

1 × 603

3 × 201

9 × 67

First multiples

603 · 1,206 (double) · 1,809 · 2,412 · 3,015 · 3,618 · 4,221 · 4,824 · 5,427 · 6,030

Sums & aliquot sequence

As consecutive integers: 301 + 302 200 + 201 + 202 98 + 99 + 100 + 101 + 102 + 103 63 + 64 + … + 71

Aliquot sequence: 603 → 281 → 1 → 0 — terminates at zero

Representations

In words: six hundred three
Ordinal: 603rd
Roman numeral: DCIII
Binary: 1001011011
Octal: 1133
Hexadecimal: 0x25B
Base64: Als=
One's complement: 64,932 (16-bit)

In other bases

ternary (3) 211100

quaternary (4) 21123

quinary (5) 4403

senary (6) 2443

septenary (7) 1521

nonary (9) 740

undecimal (11) 4a9

duodecimal (12) 423

tridecimal (13) 375

tetradecimal (14) 311

pentadecimal (15) 2a3

Historical numeral systems

Babylonian (base 60): 𒌋 𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺
Greek (Milesian): χγʹ
Mayan (base 20): 𝋡·𝋪·𝋣
Chinese: 六百零三
Chinese (financial): 陸佰零參

In other modern scripts

Eastern Arabic ٦٠٣ Devanagari ६०३ Bengali ৬০৩ Tamil ௬௦௩ Thai ๖๐๓ Tibetan ༦༠༣ Khmer ៦០៣ Lao ໖໐໓ Burmese ၆၀၃

Digit at this position in famous constants

π — Pi (π): Digit 603 = 0
e — Euler's number (e): Digit 603 = 0
φ — Golden ratio (φ): Digit 603 = 6
√2 — Pythagoras's (√2): Digit 603 = 7
ln 2 — Natural log of 2: Digit 603 = 9
γ — Euler-Mascheroni (γ): Digit 603 = 0

Also seen as

Unicode codepoint

Latin Small Letter Open E

U+025B

Lowercase letter (Ll)

UTF-8 encoding: C9 9B (2 bytes).

Lookup U+025B on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00025B

RGB(0, 2, 91)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.91.

Address: 0.0.2.91
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.91

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

NANP area code 603

The number 603 is an active NANP area code (North American Numbering Plan).

Primary area: Statewide
Region: New Hampshire
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 603 ↗