Names of 409
| Nominal | 409 |
| Cardinal | four hundred nine |
| Ordinal | 409th |
| This number as US currency | four hundred nine dollars |
| Is 409 an odd number? | 409 is an odd number |
| Is 409 an even number? | 409 is NOT an even number |
| Is 409 a palindrome? | 409 is NOT a palindrome number |
| Is 409 a triangle number? | 409 is NOT a triangle number |
409 in other Bases
| Base 2 (Binary) | 1100110012 |
| Base 3 (Ternary) | 1200113 |
| Base 4 (Quaternary) | 121214 |
| Base 5 (Quinary) | 31145 |
| Base 6 (Senary) | 15216 |
| Base 8 (Octal) | 6318 |
| Base 12 (Duodecimal) | 2A112 |
| Base 16 (Hexadecimal) | 19916 |
| Base 20 (Vigesimal) | 10920 |
Primes and Factors tests for 409
| Is 409 a Prime Number? | 409 is a prime |
| Is 409 a perfect number? | 409 is NOT a perfect number |
| Is 409 a Mersenne Prime? | 409 is NOT a Mersenne prime |
| Is 409 a Fermat Prime? | 409 is NOT a Fermat prime |
| Is 409 a Fibonacci Prime? | 409 is NOT a Fibonacci prime |
| Is 409 a Partition Prime? | 409 is NOT a Partition prime |
| Is 409 a Pell Prime? | 409 is NOT a Pell prime |
| Prime Factors | Prime factors of 409 |
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409 in other Numerals
| 409 in Roman Numeral | CDIX |
| 409 in Chinese Numeral | 肆佰玖 |
| 409 in Egyptian Numeral | 𓍥𓐂 |
| 409 in Babylonian Numeral |   |
Roots and stuff for 409
| Is 409 a square number? | 409 is NOT a square number |
| Is 409 a cube number? | 409 is NOT a cube number |
| Square root of the number 409 | 20.223748416157 |
| Cube root of the number 409 | 7.4229141204362 |
Recreational math for 409
| Number 409 reversed | 904 |
| Sum of the digits | 13 |
| No of digits | 3 |