Names of 1643
| Nominal | 1643 |
| Cardinal | one thousand six hundred forty-three |
| Ordinal | 1,643rd |
| This number as US currency | one thousand six hundred forty-three dollars |
| Is 1643 an odd number? | 1643 is an odd number |
| Is 1643 an even number? | 1643 is NOT an even number |
| Is 1643 a palindrome? | 1643 is NOT a palindrome number |
| Is 1643 a triangle number? | 1643 is NOT a triangle number |
1643 in other Bases
| Base 2 (Binary) | 110011010112 |
| Base 3 (Ternary) | 20202123 |
| Base 4 (Quaternary) | 1212234 |
| Base 5 (Quinary) | 230335 |
| Base 6 (Senary) | 113356 |
| Base 8 (Octal) | 31538 |
| Base 12 (Duodecimal) | B4B12 |
| Base 16 (Hexadecimal) | 66B16 |
| Base 20 (Vigesimal) | 42320 |
Primes and Factors tests for 1643
| Is 1643 a Prime Number? | 1643 is NOT a prime |
| Is 1643 a perfect number? | 1643 is NOT a perfect number |
| Is 1643 a Mersenne Prime? | 1643 is NOT a Mersenne prime |
| Is 1643 a Fermat Prime? | 1643 is NOT a Fermat prime |
| Is 1643 a Fibonacci Prime? | 1643 is NOT a Fibonacci prime |
| Is 1643 a Partition Prime? | 1643 is NOT a Partition prime |
| Is 1643 a Pell Prime? | 1643 is NOT a Pell prime |
| Prime Factors | Prime factors of 1643 |
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1643 in other Numerals
| 1643 in Roman Numeral | MDCXLIII |
| 1643 in Chinese Numeral | 壹仟陸佰肆拾叄 |
| 1643 in Egyptian Numeral | 𓆼𓍧𓎉𓏼 |
| 1643 in Babylonian Numeral |   |
Roots and stuff for 1643
| Is 1643 a square number? | 1643 is NOT a square number |
| Is 1643 a cube number? | 1643 is NOT a cube number |
| Square root of the number 1643 | 40.533936399022 |
| Cube root of the number 1643 | 11.799923393163 |
Recreational math for 1643
| Number 1643 reversed | 3461 |
| Sum of the digits | 14 |
| No of digits | 4 |