99
Everything about the number 99 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 99
| Nominal | 99 |
| Cardinal | ninety-nine |
| Ordinal | 99th |
| This number as US currency | ninety-nine dollars |
Properties (and some facts) of 99
| Is 99 an odd number? | 99 is an odd number |
| Is 99 an even number? | 99 is not an even number |
| Is 99 a palindrome? | 99 is a palindrome |
| Is 99 a triangle number? | 99 is not a triangle number |
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99 in other bases
| Base 2 (Binary) | 1100011 |
| Base 3 (Ternary) | 10200 |
| Base 4 (Quaternary) | 1203 |
| Base 5 (Quinary) | 344 |
| Base 6 (Senary) | 243 |
| Base 8 (Octal) | 143 |
| Base 12 (Duodecimal) | 83 |
| Base 16 (Hexadecimal) | 63 |
| Base 20 (Vigesimal) | 4J |
Primes and factors tests for 99
| Is 99 a prime number? | 99 is not a prime number |
| Is 99 a perfect number? | 99 is not a perfect number |
| Is 99 a Mersenne prime? | 99 is not a Mersenne prime |
| Is 99 a Fermat prime? | 99 is not a Fermat prime |
| Is 99 a Fibonacci prime? | 99 is not a Fibonacci prime |
| Is 99 a partition prime? | 99 is not a partition prime |
| Is 99 a Pell prime? | 99 is not a Pell prime |
| Prime Factors | Prime factors of 99 |
99 in other numeral systems
| 99 in Roman numerals | XCIX |
| 99 in Chinese numerals | 玖拾玖 |
| 99 in Babylonian numerals |   |
| 99 in Egyptian numerals | 𓎎𓐂 |
Roots and squares for 99
| Is 99 a square number? | 99 is not a square number |
| Is 99 a cube number? | 99 is not a cube number |
| Square root of 99 | 9.9498743710662 |
| Cube root of 99 | 4.6260650091827 |
Recreational math for 99
| Number 99 reversed | 99 |
| Sum of the digits | 18 |
| Number of digits | 2 |
Arithmetic tables for 99
Other pages about 99
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