The number 31429
31429 is a composite number with 4 divisors. Its prime factorisation is 53 × 593. Divisors (4): 1, 53, 593, 31429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 31429: a semiprime: 53 × 593, the product of two primes.
- 2
31429 is composite. Its prime factorisation is
- 3
The divisors add up to 32076; without 31429 itself that is 647, so 31429 is deficient (647 is less than 31429). Euler's totient φ(31429) = 30784 numbers up to 31429 share no factor with it.
- 4
The digits of 31429 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 103 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31429 = 53 \times 593 \]
31429 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 32076 |
| Euler totient φ(n) | 30784 |
| Square | 987782041 |
| Cube | 31045001766589 |
| Square root | 177.282261 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 103 |
| Scientific notation | 3.1429 × |
31429 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand four hundred and twenty-nine |
| Binary (base 2) | 111101011000101 |
| Octal (base 8) | 75305 |
| Hexadecimal (base 16) | 7AC5 |
| Base 3 | 1121010001 |
| As time | 31429 seconds = 8 h 43 min 49 s |
Is 31429 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 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 | 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 1) | 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 2) | 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 31429 a prime number?
No. 31429 = 53 × 593, so it is divisible by 53.
What are the factors of 31429?
1, 53, 593, 31429.
What is 31429 in binary?
111101011000101 (hexadecimal 7AC5, octal 75305).
What is the square root of 31429?
About 177.2823.
Is 31429 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 31429?
31429 is a semiprime: 53 × 593, the product of two primes.