Number

1,603

1,603 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Odious Number Pernicious Number Recamán's Sequence Self Number Semiprime Squarefree Year

Notable events — 1603 AD

Mar 24 Queen Elizabeth I dies; James VI of Scotland becomes James I of England, uniting the crowns.
Mar 24 Tokugawa Ieyasu is appointed shōgun, founding the Tokugawa shogunate.
Apr 5 The Stuart era begins in England.

Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0

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, 1603
Ended on: Wednesday
December 31, 1603
Friday the 13ths: 1
One Friday the 13th this year.
Easter Sunday: March 30
Sunday, March 30, 1603
Decade: 1600s
1600–1609
Century: 17th century
1601–1700
Millennium: 2nd millennium
1001–2000
Years ago: 423
423 years before 2026.

In other calendars

Hebrew: 5363 / 5364 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 1011 / 1012 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Water zodiac:Rabbit
Sexagenary cycle position 40 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 2146 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 981 / 982 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1595 / 1596 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1525 / 1524 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 10
Digit product: 0
Digital root: 1
Palindrome: No
Bit width: 11 bits
Reversed: 3,061
Recamán's sequence: a(1,338) = 1,603
Square (n²): 2,569,609
Cube (n³): 4,119,083,227
Divisor count: 4
σ(n) — sum of divisors: 1,840
φ(n) — Euler's totient: 1,368
Sum of prime factors: 236

Primality

Prime factorization: 7 × 229

Nearest primes: 1,601 (−2) · 1,607 (+4)

Divisors & multiples

All divisors (4)

1 · 7 · 229 · 1603

Aliquot sum (sum of proper divisors): 237

Factor pairs (a × b = 1,603)

1 × 1603

7 × 229

First multiples

1,603 · 3,206 (double) · 4,809 · 6,412 · 8,015 · 9,618 · 11,221 · 12,824 · 14,427 · 16,030

Sums & aliquot sequence

As consecutive integers: 801 + 802 226 + 227 + … + 232 108 + 109 + … + 121

Aliquot sequence: 1,603 → 237 → 83 → 1 → 0 — terminates at zero

Representations

In words: one thousand six hundred three
Ordinal: 1603rd
Roman numeral: MDCIII
Binary: 11001000011
Octal: 3103
Hexadecimal: 0x643
Base64: BkM=
One's complement: 63,932 (16-bit)

In other bases

ternary (3) 2012101

quaternary (4) 121003

quinary (5) 22403

senary (6) 11231

septenary (7) 4450

nonary (9) 2171

undecimal (11) 1228

duodecimal (12) b17

tridecimal (13) 964

tetradecimal (14) 827

pentadecimal (15) 71d

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺
Greek (Milesian): ͵αχγʹ
Mayan (base 20): 𝋤·𝋠·𝋣
Chinese: 一千六百零三
Chinese (financial): 壹仟陸佰零參

In other modern scripts

Eastern Arabic ١٦٠٣ Devanagari १६०३ Bengali ১৬০৩ Tamil ௧௬௦௩ Thai ๑๖๐๓ Tibetan ༡༦༠༣ Khmer ១៦០៣ Lao ໑໖໐໓ Burmese ၁၆၀၃

Digit at this position in famous constants

π — Pi (π): Digit 1,603 = 1
e — Euler's number (e): Digit 1,603 = 4
φ — Golden ratio (φ): Digit 1,603 = 1
√2 — Pythagoras's (√2): Digit 1,603 = 2
ln 2 — Natural log of 2: Digit 1,603 = 4
γ — Euler-Mascheroni (γ): Digit 1,603 = 6

Also seen as

Unicode codepoint

Arabic Letter Kaf

U+0643

Other letter (Lo)

UTF-8 encoding: D9 83 (2 bytes).

Lookup U+0643 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000643

RGB(0, 6, 67)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.67.

Address: 0.0.6.67
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.6.67

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

Position in π

The digit sequence 1603 first appears in π at position 1,206 of the decimal expansion (the 1,206ordinal-suffix:th digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 1603 on Pi Search ↗