9999
Everything about the number 9999 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 9999
| Nominal | 9999 |
| Cardinal | nine thousand nine hundred ninety-nine |
| Ordinal | 9,999th |
| This number as US currency | nine thousand nine hundred ninety-nine dollars |
Properties (and some facts) of 9999
| Is 9999 an odd number? | 9999 is an odd number |
| Is 9999 an even number? | 9999 is not an even number |
| Is 9999 a palindrome? | 9999 is a palindrome |
| Is 9999 a triangle number? | 9999 is not a triangle number |
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9999 in other bases
| Base 2 (Binary) | 10011100001111 |
| Base 3 (Ternary) | 111201100 |
| Base 4 (Quaternary) | 2130033 |
| Base 5 (Quinary) | 304444 |
| Base 6 (Senary) | 114143 |
| Base 8 (Octal) | 23417 |
| Base 12 (Duodecimal) | 5953 |
| Base 16 (Hexadecimal) | 270F |
| Base 20 (Vigesimal) | 14JJ |
Primes and factors tests for 9999
| Is 9999 a prime number? | 9999 is not a prime number |
| Is 9999 a perfect number? | 9999 is not a perfect number |
| Is 9999 a Mersenne prime? | 9999 is not a Mersenne prime |
| Is 9999 a Fermat prime? | 9999 is not a Fermat prime |
| Is 9999 a Fibonacci prime? | 9999 is not a Fibonacci prime |
| Is 9999 a partition prime? | 9999 is not a partition prime |
| Is 9999 a Pell prime? | 9999 is not a Pell prime |
| Prime Factors | Prime factors of 9999 |
9999 in other numeral systems
| 9999 in Roman numerals | MXCMXCIX |
| 9999 in Chinese numerals | 玖仟玖佰玖拾玖 |
| 9999 in Babylonian numerals |    |
| 9999 in Egyptian numerals | 𓇄𓍪𓎎𓐂 |
Roots and squares for 9999
| Is 9999 a square number? | 9999 is not a square number |
| Is 9999 a cube number? | 9999 is not a cube number |
| Square root of 9999 | 99.994999874994 |
| Cube root of 9999 | 21.543628731483 |
Recreational math for 9999
| Number 9999 reversed | 9999 |
| Sum of the digits | 36 |
| Number of digits | 4 |
Arithmetic tables for 9999
Other pages about 9999
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