3
Everything about the number 3 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 3
| Nominal | 3 |
| Cardinal | three |
| Ordinal | 3rd |
| This number as US currency | three dollars |
Properties (and some facts) of 3
| Is 3 an odd number? | 3 is an odd number |
| Is 3 an even number? | 3 is not an even number |
| Is 3 a palindrome? | 3 is a palindrome |
| Is 3 a triangle number? | 3 is a triangle number |
| Factorial (3!) of the number 3 | 6 |
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3 in other bases
| Base 2 (Binary) | 11 |
| Base 3 (Ternary) | 10 |
| Base 4 (Quaternary) | 3 |
| Base 5 (Quinary) | 3 |
| Base 6 (Senary) | 3 |
| Base 8 (Octal) | 3 |
| Base 12 (Duodecimal) | 3 |
| Base 16 (Hexadecimal) | 3 |
| Base 20 (Vigesimal) | 3 |
Primes and factors tests for 3
| Is 3 a prime number? | 3 is a prime number |
| Is 3 a perfect number? | 3 is not a perfect number |
| Is 3 a Mersenne prime? | 3 is a Mersenne prime |
| Is 3 a Fermat prime? | 3 is a Fermat prime |
| Is 3 a Fibonacci prime? | 3 is a Fibonacci prime |
| Is 3 a partition prime? | 3 is a partition prime |
| Is 3 a Pell prime? | 3 is not a Pell prime |
| Prime Factors | Prime factors of 3 |
3 in other numeral systems
| 3 in Roman numerals | III |
| 3 in Chinese numerals | 叄 |
| 3 in Babylonian numerals |  |
| 3 in Egyptian numerals | 𓏼 |
Roots and squares for 3
| Is 3 a square number? | 3 is not a square number |
| Is 3 a cube number? | 3 is not a cube number |
| Square root of 3 | 1.7320508075689 |
| Cube root of 3 | 1.4422495703074 |
Recreational math for 3
| Number 3 reversed | 3 |
| Sum of the digits | 3 |
| Number of digits | 1 |
Arithmetic tables for 3
Other pages about 3
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