The number 70013
70013 is a composite number with 4 divisors. Its prime factorisation is 53 × 1321. Divisors (4): 1, 53, 1321, 70013.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 70013: a semiprime: 53 × 1321, the product of two primes.
- 2
70013 is composite. Its prime factorisation is
- 3
The divisors add up to 71388; without 70013 itself that is 1375, so 70013 is deficient (1375 is less than 70013). Euler's totient φ(70013) = 68640 numbers up to 70013 share no factor with it.
- 4
The digits of 70013 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 55 steps to reach 1.
LaTeX source of the formulas on this page
\[ 70013 = 53 \times 1321 \]
70013 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 71388 |
| Euler totient φ(n) | 68640 |
| Square | 4901820169 |
| Cube | 343191135492197 |
| Square root | 264.599698 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 55 |
| Scientific notation | 7.0013 × |
70013 in other forms
| Form | Value |
|---|---|
| In words | seventy thousand and thirteen |
| Binary (base 2) | 10001000101111101 |
| Octal (base 8) | 210575 |
| Hexadecimal (base 16) | 1117D |
| Base 3 | 10120001002 |
| As time | 70013 seconds = 19 h 26 min 53 s |
Is 70013 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 2) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 70013 a prime number?
No. 70013 = 53 × 1321, so it is divisible by 53.
What are the factors of 70013?
1, 53, 1321, 70013.
What is 70013 in binary?
10001000101111101 (hexadecimal 1117D, octal 210575).
What is the square root of 70013?
About 264.5997.
Is 70013 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 70013?
70013 is a semiprime: 53 × 1321, the product of two primes.