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7

Number 7 (seven) is an odd digit prime number and natural number following 6 and preceding 8.

Properties of the number 7

Nominal7
Cardinalseven
Ordinal7th
Number of digits1
Sum of digits7
Product of digits7
Number parityOdd
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Prime Factorization of 7

Prime factorization7
Prime factors7
Number of distinct prime factors ω(n)1
Total number of prime factors Ω(n)1
Sum of prime factors7
Product of prime factors7
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Divisors of 7

List of proper divisors 1
List of all dividers1, 7
Number of divisors d(n)2
Sum of all divisors σ(n)8
Aliquot sum 1
7 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 6.
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Prime numbers

Is 7 a prime number?Yes
Is 7 a semiprime number?No
Is 7 a Chen prime number?Yes
Is 7 a Mersenne prime number?Yes: M3
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Sequences

Is 7 a Catalan number?No
Is 7 a Fibonacci number?No
Is 7 a Idoneal number?Yes: I6
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Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
7 is a Happy number
7 is a Humble number
7 is not a Münchhausen number
7 is not a Perfect number
7 is not a Perfect square
7 is a Palindrome
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Numeric Bases of 7

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary1112
3Ternary213
4Quaternary134
5Quinary125
6Senary116
7Septenary107
8Octal78
9Nonary79
10Decimal7
12Duodecimal712
16Hexadecimal716
20Vigesimal720
36Base36736
60Sexagesimal760
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Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
Square of 7 (n2)49
Cube of 7 (n3)343
Square root of 72.6457513110646
Natural Logarithm (ln) of 71.9459101490553
Decimal Logarithm (log) of 70.84509804001426
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 70.65698659871879
Cosecant of 71.5221010625637
Cosine of 70.7539022543433
Secant of 71.3264319004737
Tangent of 70.87144798272432
Cotangent of 71.1475154224051
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Number parity

Parity is the property of an integer of whether it is even or odd.

Is 7 an Even Number?

No

Is 7 an Odd Number?

Yes, the number 7 is an odd number.
Total number of all odd numbers from 1 to 7 is 4
Sum of all the odd numbers from 1 to 7 are 16
The sum of all odd numbers is a perfect square: 16 = 4
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
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Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
The spelling of 7 in words is "seven", meaning that:
7 is an aban number (a number without the letter a)
7 is not an eban number (as it contains the letter e)
7 is an iban number (a number without the letter i)
7 is an oban number (a number without the letter o)
7 is a tban number (a number without the letter t)
7 is an uban number (a number without the letter u)
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Numeral systems

How to write 7 in other number systems?
Bengali numerals
Eastern Arabic numerals٧
Hieroglyphs numeralsused in Ancient Egypt𓐀
Khmer numerals
Japanese numerals
Roman numeralsVII
Thai numerals
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Translation

How do you say 7 in 38 different languages?
Arabicسبعة
Croatiansedam
Czechsedm
Danish syv
Dutchzeven
Estonianadre
Faroesesjey
Filipinopitó
Finnishseitsemän
Frenchsept
Greekεπτά
Germansieben
Hebrewשבע
Hindiसात
Hungarianhét
Icelandicsjó
Indonesiantujuh
Italiansette
Japanese
Korean
Latvianseptiņi
Lithuanianseptyni
Norwegiansju
Persianهفت
Polishsiedem
Portuguesesete
Romanianşapte
Russianсемь
Serbianседам
Slovaksedem
Slovenesedem
Spanish siete
Swahilisaba
Swedishsju
Thaiเจ็ด
Turkishyedi
Ukrainianсім
Vietnamesebảy
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Miscellaneous

Number 7 reversed7
ASCII Code7
Unicode CharacterU+0007
Unix TimestampThu, 01 Jan 1970 00:00:07 +0000
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