# 169

## 169 is an odd composite number. It is composed of a single prime number multiplied by itself.

What does the number 169 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 3 divisors.

169 is an odd composite number. It has a total of three divisors.

## Prime factorization of 169:

### 132

(13 × 13)

See below for interesting mathematical facts about the number 169 from the Numbermatics database.

### Names of 169

• Cardinal: 169 can be written as One hundred sixty-nine.

### Scientific notation

• Scientific notation: 1.69 × 102

### Factors of 169

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 13

### Divisors of 169

• Number of divisors d(n): 3
• Complete list of divisors:
• Sum of all divisors σ(n): 183
• Sum of proper divisors (its aliquot sum) s(n): 14
• 169 is a deficient number, because the sum of its proper divisors (14) is less than itself. Its deficiency is 155

### Bases of 169

• Binary: 101010012
• Base-36: 4P

### Squares and roots of 169

• 169 squared (1692) is 28561
• 169 cubed (1693) is 4826809
• 169 is a perfect square number. Its square root is 13
• The cube root of 169 is 5.5287748137

### Scales and comparisons

How big is 169?
• 169 seconds is equal to 2 minutes, 49 seconds.
• To count from 1 to 169 would take you about twenty-four seconds.

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 169 cubic inches would be around 0.5 feet tall.

### Recreational maths with 169

• 169 backwards is 961
• The number of decimal digits it has is: 3
• The sum of 169's digits is 16
• More coming soon!