Names of 3999
| Nominal | 3999 |
| Cardinal | three thousand nine hundred ninety-nine |
| Ordinal | 3,999th |
| This number as US currency | three thousand nine hundred ninety-nine dollars |
| Is 3999 an odd number? | 3999 is an odd number |
| Is 3999 an even number? | 3999 is NOT an even number |
| Is 3999 a palindrome? | 3999 is NOT a palindrome number |
| Is 3999 a triangle number? | 3999 is NOT a triangle number |
3999 in other Bases
| Base 2 (Binary) | 1111100111112 |
| Base 3 (Ternary) | 121110103 |
| Base 4 (Quaternary) | 3321334 |
| Base 5 (Quinary) | 1114445 |
| Base 6 (Senary) | 303036 |
| Base 8 (Octal) | 76378 |
| Base 12 (Duodecimal) | 239312 |
| Base 16 (Hexadecimal) | F9F16 |
| Base 20 (Vigesimal) | 9JJ20 |
Primes and Factors tests for 3999
| Is 3999 a Prime Number? | 3999 is NOT a prime |
| Is 3999 a perfect number? | 3999 is NOT a perfect number |
| Is 3999 a Mersenne Prime? | 3999 is NOT a Mersenne prime |
| Is 3999 a Fermat Prime? | 3999 is NOT a Fermat prime |
| Is 3999 a Fibonacci Prime? | 3999 is NOT a Fibonacci prime |
| Is 3999 a Partition Prime? | 3999 is NOT a Partition prime |
| Is 3999 a Pell Prime? | 3999 is NOT a Pell prime |
| Prime Factors | Prime factors of 3999 |
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3999 in other Numerals
| 3999 in Roman Numeral | MMMCMXCIX |
| 3999 in Chinese Numeral | 叄仟玖佰玖拾玖 |
| 3999 in Egyptian Numeral | 𓆾𓍪𓎎𓐂 |
| 3999 in Babylonian Numeral |    |
Roots and stuff for 3999
| Is 3999 a square number? | 3999 is NOT a square number |
| Is 3999 a cube number? | 3999 is NOT a cube number |
| Square root of the number 3999 | 63.23764701505 |
| Cube root of the number 3999 | 15.872687575221 |
Recreational math for 3999
| Number 3999 reversed | 9993 |
| Sum of the digits | 30 |
| No of digits | 4 |