# 1091

## 1,091 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 1091 look like?

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

1091 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 1091:

### 1091

See below for interesting mathematical facts about the number 1091 from the Numbermatics database.

### Names of 1091

• Cardinal: 1091 can be written as One thousand and ninety-one.

### Scientific notation

• Scientific notation: 1.091 × 103

### Factors of 1091

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1091

### Divisors of 1091

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 1092
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1091 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1090

### Bases of 1091

• Binary: 100010000112
• Base-36: UB

### Squares and roots of 1091

• 1091 squared (10912) is 1190281
• 1091 cubed (10913) is 1298596571
• The square root of 1091 is 33.0302891299
• The cube root of 1091 is 10.2945709285

### Scales and comparisons

How big is 1091?
• 1,091 seconds is equal to 18 minutes, 11 seconds.
• To count from 1 to 1,091 would take you about eighteen 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 1091 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1091

• 1091 backwards is 1901
• 1091 is a twin prime! Its twin is 1093
• The number of decimal digits it has is: 4
• The sum of 1091's digits is 11
• More coming soon!