# Number 7

### Names of 7

 Nominal 7 Cardinal seven Ordinal 7th This number as US currency seven dollars

### Properties (and some facts) of 7

 Is 7 an odd number? 7 is an odd number Is 7 an even number? 7 is NOT an even number Is 7 a palindrome? 7 is a palindrome number Is 7 a triangle number? 7 is NOT a triangle number Factorial (n!) of number 7! 5040

### 7 in other Bases

 Base 2 (Binary) 1112 Base 3 (Ternary) 213 Base 4 (Quaternary) 134 Base 5 (Quinary) 125 Base 6 (Senary) 116 Base 8 (Octal) 78 Base 12 (Duodecimal) 712 Base 16 (Hexadecimal) 716 Base 20 (Vigesimal) 720

### Primes and Factors tests for 7

 Is 7 a Prime Number? 7 is a prime Is 7 a perfect number? 7 is NOT a perfect number Is 7 a Mersenne Prime? 7 is a Mersenne prime Is 7 a Fermat Prime? 7 is NOT a Fermat prime Is 7 a Fibonacci Prime? 7 is NOT a Fibonacci prime Is 7 a Partition Prime? 7 is a Partition prime Is 7 a Pell Prime? 7 is NOT a Pell prime Prime Factors Prime factors of 7

### 7 in other Numerals

 7 in Roman Numeral VII 7 in Chinese Numeral 柒 7 in Egyptian Numeral 𓐀 7 in Babylonian Numeral

### Roots and stuff for 7

 Is 7 a square number? 7 is NOT a square number Is 7 a cube number? 7 is NOT a cube number Square root of the number 7 2.6457513110646 Cube root of the number 7 1.9129311827724

### Recreational math for 7

 Number 7 reversed 7 Sum of the digits 7 No of digits 1

### Arithmetic Tables for 7

 Multiplication Table 7 Addition Table 7 Subtraction Table 7 Division Table 7 Base 7 Multiplication Table Base 7 addition Table