Number

104

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

Abundant Number Odious Number Pernicious Number Practical Number Recamán's Sequence Semiperfect Number Year

Historical context — 104 AD

Calendar year

Year 104 (CIV) was a leap year starting on Monday of the Julian calendar, the 104th Year of the Anno Domini (AD) designation, the 104th year of the 1st millennium, the 4th year of the 2nd century, and the 5th year of the 100s decade.

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Historical context — 104 BC

Calendar year

Year 104 BC was a year of the pre-Julian Roman calendar.

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Year facts

Year type: Leap year
Divisible by 4 and not by 100; February has 29 days.
Days in year: 366
ISO weeks: 52
Started on: Tuesday
January 1, 104
Ended on: Wednesday
December 31, 104
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 100s
100–109
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,922
1922 years before 2026.

In other calendars

Hebrew: 3864 / 3865 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Dragon
Sexagenary cycle position 41 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 647 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 96 / 97 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 26 / 25 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 5
Digit product: 0
Digital root: 5
Palindrome: No
Bit width: 7 bits
Reversed: 401
Recamán's sequence: a(379) = 104
Square (n²): 10,816
Cube (n³): 1,124,864
Divisor count: 8
σ(n) — sum of divisors: 210
φ(n) — Euler's totient: 48
Sum of prime factors: 19

Primality

Prime factorization: 2 ³ × 13

Nearest primes: 103 (−1) · 107 (+3)

Divisors & multiples

All divisors (8)

1 · 2 · 4 · 8 · 13 · 26 · 52 (half) · 104

Aliquot sum (sum of proper divisors): 106

Factor pairs (a × b = 104)

1 × 104

2 × 52

4 × 26

8 × 13

First multiples

104 · 208 (double) · 312 · 416 · 520 · 624 · 728 · 832 · 936 · 1,040

Sums & aliquot sequence

As a sum of two squares: 2² + 10²

As consecutive integers: 2 + 3 + … + 14

Aliquot sequence: 104 → 106 → 56 → 64 → 63 → 41 → 1 → 0 — terminates at zero

Representations

In words: one hundred four
Ordinal: 104th
Roman numeral: CIV
Binary: 1101000
Octal: 150
Hexadecimal: 0x68
Base64: aA==
One's complement: 151 (8-bit)

In other bases

ternary (3) 10212

quaternary (4) 1220

quinary (5) 404

senary (6) 252

septenary (7) 206

nonary (9) 125

undecimal (11) 95

duodecimal (12) 88

tridecimal (13) 80

tetradecimal (14) 76

pentadecimal (15) 6e

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓏺𓏺𓏺𓏺
Greek (Milesian): ρδʹ
Mayan (base 20): 𝋥·𝋤
Chinese: 一百零四
Chinese (financial): 壹佰零肆

In other modern scripts

Eastern Arabic ١٠٤ Devanagari १०४ Bengali ১০৪ Tamil ௧௦௪ Thai ๑๐๔ Tibetan ༡༠༤ Khmer ១០៤ Lao ໑໐໔ Burmese ၁၀၄

Digit at this position in famous constants

π — Pi (π): Digit 104 = 1
e — Euler's number (e): Digit 104 = 4
φ — Golden ratio (φ): Digit 104 = 7
√2 — Pythagoras's (√2): Digit 104 = 0
ln 2 — Natural log of 2: Digit 104 = 0
γ — Euler-Mascheroni (γ): Digit 104 = 6

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 104, here are decompositions:

3 + 101 = 104
7 + 97 = 104
31 + 73 = 104
37 + 67 = 104
43 + 61 = 104

ASCII character

As an ASCII codepoint, 104 is h. Printable ASCII character h.

Hex color

#000068

RGB(0, 0, 104)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.104.

Address: 0.0.0.104
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.104

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