The number 15379
15379 is a composite number with 8 divisors. Its prime factorisation is 7 Ć . Divisors (8): 1, 7, 13, 91, 169, 1183, 2197, 15379.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
15379 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
15379 is composite. Its prime factorisation is
- 3
The divisors add up to 19040; without 15379 itself that is 3661, so 15379 is deficient (3661 is less than 15379). Euler's totient Ļ(15379) = 12168 numbers up to 15379 share no factor with it.
- 4
The digits of 15379 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 58 steps to reach 1.
LaTeX source of the formulas on this page
\[ 15379 = 7 \times 13^{3} \]15379 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 19040 |
| Euler totient Ļ(n) | 12168 |
| Square | 236513641 |
| Cube | 3637343284939 |
| Square root | 124.012096 (= 13ā91) |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 58 |
| Scientific notation | 1.5379 Ć |
15379 in other forms
| Form | Value |
|---|---|
| In words | fifteen thousand three hundred and seventy-nine |
| Binary (base 2) | 11110000010011 |
| Octal (base 8) | 36023 |
| Hexadecimal (base 16) | 3C13 |
| Base 3 | 210002121 |
| As time | 15379 seconds = 4 h 16 min 19 s |
Is 15379 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (15379 Ć· 7 = 2197) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 15379 a prime number?
No. 15379 = 7 Ć , so it is divisible by 7.
What are the factors of 15379?
1, 7, 13, 91, 169, 1183, 2197, 15379.
What is 15379 in binary?
11110000010011 (hexadecimal 3C13, octal 36023).
What is the square root of 15379?
About 124.0121, exactly 13ā91.
Is 15379 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 15379?
It is a composite number with 8 divisors.