# 9961

## 9,961 is an odd composite number composed of two prime numbers multiplied together.

What does the number 9961 look like?

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

9961 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 9961:

### 7 × 1423

See below for interesting mathematical facts about the number 9961 from the Numbermatics database.

### Names of 9961

• Cardinal: 9961 can be written as Nine thousand, nine hundred sixty-one.

### Scientific notation

• Scientific notation: 9.961 × 103

### Factors of 9961

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 1430

### Divisors of 9961

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 11392
• Sum of proper divisors (its aliquot sum) s(n): 1431
• 9961 is a deficient number, because the sum of its proper divisors (1431) is less than itself. Its deficiency is 8530

### Bases of 9961

• Binary: 100110111010012
• Base-36: 7OP

### Squares and roots of 9961

• 9961 squared (99612) is 99221521
• 9961 cubed (99613) is 988345570681
• The square root of 9961 is 99.8048095033
• The cube root of 9961 is 21.5163027603

### Scales and comparisons

How big is 9961?
• 9,961 seconds is equal to 2 hours, 46 minutes, 1 second.
• To count from 1 to 9,961 would take you about two hours.

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 9961 cubic inches would be around 1.8 feet tall.

### Recreational maths with 9961

• 9961 backwards is 1699
• The number of decimal digits it has is: 4
• The sum of 9961's digits is 25
• More coming soon!