The number 13897
13897 is a composite number with 4 divisors. Its prime factorisation is 13 × 1069. Divisors (4): 1, 13, 1069, 13897.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13897: a semiprime: 13 × 1069, the product of two primes.
- 2
13897 is composite. Its prime factorisation is
- 3
The divisors add up to 14980; without 13897 itself that is 1083, so 13897 is deficient (1083 is less than 13897). Euler's totient φ(13897) = 12816 numbers up to 13897 share no factor with it.
- 4
The digits of 13897 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 138 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13897 = 13 \times 1069 \]
13897 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 14980 |
| Euler totient φ(n) | 12816 |
| Square | 193126609 |
| Cube | 2683880485273 |
| Square root | 117.885538 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 138 |
| Scientific notation | 1.3897 × |
13897 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand eight hundred and ninety-seven |
| Binary (base 2) | 11011001001001 |
| Octal (base 8) | 33111 |
| Hexadecimal (base 16) | 3649 |
| Base 3 | 201001201 |
| As time | 13897 seconds = 3 h 51 min 37 s |
Is 13897 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 2) | 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 | No (remainder 2) | 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 7) | 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 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 13897 a prime number?
No. 13897 = 13 × 1069, so it is divisible by 13.
What are the factors of 13897?
1, 13, 1069, 13897.
What is 13897 in binary?
11011001001001 (hexadecimal 3649, octal 33111).
What is the square root of 13897?
About 117.8855.
Is 13897 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 13897?
13897 is a semiprime: 13 × 1069, the product of two primes.