# 139

## 139 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 139 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

139 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 139:

### 139

See below for interesting mathematical facts about the number 139 from the Numbermatics database.

### Names of 139

• Cardinal: 139 can be written as One hundred thirty-nine.

### Scientific notation

• Scientific notation: 1.39 × 102

### Factors of 139

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 139

### Divisors of 139

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 140
• Sum of proper divisors (its aliquot sum) s(n): 1
• 139 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 138

### Bases of 139

• Binary: 100010112
• Base-36: 3V

### Squares and roots of 139

• 139 squared (1392) is 19321
• 139 cubed (1393) is 2685619
• The square root of 139 is 11.7898261225
• The cube root of 139 is 5.1801014675

### Scales and comparisons

How big is 139?
• 139 seconds is equal to 2 minutes, 19 seconds.
• To count from 1 to 139 would take you about nine 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 139 cubic inches would be around 0.4 feet tall.

### Recreational maths with 139

• 139 backwards is 931
• The number of decimal digits it has is: 3
• The sum of 139's digits is 13
• More coming soon!