# 1191

## 1,191 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1191 look like?

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

1191 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 1191:

### 3 × 397

See below for interesting mathematical facts about the number 1191 from the Numbermatics database.

### Names of 1191

• Cardinal: 1191 can be written as One thousand, one hundred ninety-one.

### Scientific notation

• Scientific notation: 1.191 × 103

### Factors of 1191

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 400

### Divisors of 1191

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 1592
• Sum of proper divisors (its aliquot sum) s(n): 401
• 1191 is a deficient number, because the sum of its proper divisors (401) is less than itself. Its deficiency is 790

### Bases of 1191

• Binary: 100101001112
• Base-36: X3

### Squares and roots of 1191

• 1191 squared (11912) is 1418481
• 1191 cubed (11913) is 1689410871
• The square root of 1191 is 34.5108678535
• The cube root of 1191 is 10.5999525333

### Scales and comparisons

How big is 1191?
• 1,191 seconds is equal to 19 minutes, 51 seconds.
• To count from 1 to 1,191 would take you about nineteen 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 1191 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1191

• 1191 backwards is 1911
• The number of decimal digits it has is: 4
• The sum of 1191's digits is 12
• More coming soon!