The number 13479
13479 is a composite number with 4 divisors. Its prime factorisation is 3 × 4493. Divisors (4): 1, 3, 4493, 13479.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13479: a semiprime: 3 × 4493, the product of two primes.
- 2
13479 is composite. Its prime factorisation is
- 3
The divisors add up to 17976; without 13479 itself that is 4497, so 13479 is deficient (4497 is less than 13479). Euler's totient φ(13479) = 8984 numbers up to 13479 share no factor with it.
- 4
The digits of 13479 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 89 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13479 = 3 \times 4493 \]
13479 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 17976 |
| Euler totient φ(n) | 8984 |
| Square | 181683441 |
| Cube | 2448911101239 |
| Square root | 116.099096 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 89 |
| Scientific notation | 1.3479 × |
13479 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand four hundred and seventy-nine |
| Binary (base 2) | 11010010100111 |
| Octal (base 8) | 32247 |
| Hexadecimal (base 16) | 34A7 |
| Base 3 | 200111020 |
| As time | 13479 seconds = 3 h 44 min 39 s |
Is 13479 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (13479 ÷ 3 = 4493) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 13479 a prime number?
No. 13479 = 3 × 4493, so it is divisible by 3.
What are the factors of 13479?
1, 3, 4493, 13479.
What is 13479 in binary?
11010010100111 (hexadecimal 34A7, octal 32247).
What is the square root of 13479?
About 116.0991.
Is 13479 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 13479?
13479 is a semiprime: 3 × 4493, the product of two primes.