# 689

## 689 is an odd composite number composed of two prime numbers multiplied together.

What does the number 689 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

689 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 689:

### 13 × 53

See below for interesting mathematical facts about the number 689 from the Numbermatics database.

### Names of 689

• Cardinal: 689 can be written as Six hundred eighty-nine.

### Scientific notation

• Scientific notation: 6.89 × 102

### Factors of 689

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 66

### Divisors of 689

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 756
• Sum of proper divisors (its aliquot sum) s(n): 67
• 689 is a deficient number, because the sum of its proper divisors (67) is less than itself. Its deficiency is 622

### Bases of 689

• Binary: 10101100012
• Base-36: J5

### Squares and roots of 689

• 689 squared (6892) is 474721
• 689 cubed (6893) is 327082769
• The square root of 689 is 26.2488094969
• The cube root of 689 is 8.8322849909

### Scales and comparisons

How big is 689?
• 689 seconds is equal to 11 minutes, 29 seconds.
• To count from 1 to 689 would take you about five minutes.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 689 cubic inches would be around 0.7 feet tall.

### Recreational maths with 689

• 689 backwards is 986
• The number of decimal digits it has is: 3
• The sum of 689's digits is 23
• More coming soon!

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"Number 689 - Facts about the integer". Numbermatics.com. 2021. Web. 30 November 2021.

APA style:
Numbermatics. (2021). Number 689 - Facts about the integer. Retrieved 30 November 2021, from https://numbermatics.com/n/689/

Chicago style:
Numbermatics. 2021. "Number 689 - Facts about the integer". https://numbermatics.com/n/689/

The information we have on file for 689 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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