The number 24913
24913 is a composite number with 4 divisors. Its prime factorisation is 7 × 3559. Divisors (4): 1, 7, 3559, 24913.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 24913: a semiprime: 7 × 3559, the product of two primes.
- 2
24913 is composite. Its prime factorisation is
- 3
The divisors add up to 28480; without 24913 itself that is 3567, so 24913 is deficient (3567 is less than 24913). Euler's totient φ(24913) = 21348 numbers up to 24913 share no factor with it.
- 4
The digits of 24913 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 95 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24913 = 7 \times 3559 \]
24913 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 28480 |
| Euler totient φ(n) | 21348 |
| Square | 620657569 |
| Cube | 15462442016497 |
| Square root | 157.838525 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 95 |
| Scientific notation | 2.4913 × |
24913 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand nine hundred and thirteen |
| Binary (base 2) | 110000101010001 |
| Octal (base 8) | 60521 |
| Hexadecimal (base 16) | 6151 |
| Base 3 | 1021011201 |
| As time | 24913 seconds = 6 h 55 min 13 s |
Is 24913 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 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (24913 ÷ 7 = 3559) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 24913 a prime number?
No. 24913 = 7 × 3559, so it is divisible by 7.
What are the factors of 24913?
1, 7, 3559, 24913.
What is 24913 in binary?
110000101010001 (hexadecimal 6151, octal 60521).
What is the square root of 24913?
About 157.8385.
Is 24913 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 24913?
24913 is a semiprime: 7 × 3559, the product of two primes.