12991209

12,991,209 is an odd composite number composed of four prime numbers multiplied together.

What does the number 12991209 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

12991209 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 12991209:

3 × 7 × 11 × 56239

See below for interesting mathematical facts about the number 12991209 from the Numbermatics database.

Names of 12991209

Cardinal: 12991209 can be written as Twelve million, nine hundred ninety-one thousand, two hundred nine.

Scientific notation

Scientific notation: 1.2991209 × 10⁷

Factors of 12991209

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 56260

Divisors of 12991209

Number of divisors d(n): 16
Complete list of divisors:
1 3 7 11 21 33 77 231 56239 168717 393673 618629 1181019 1855887 4330403 12991209
Sum of all divisors σ(n): 21596160
Sum of proper divisors (its aliquot sum) s(n): 8604951
12991209 is a deficient number, because the sum of its proper divisors (8604951) is less than itself. Its deficiency is 4386258

Bases of 12991209

Binary: 110001100011101011101001₂
Hexadecimal: 0xC63AE9
Base-36: 7QG2X

Squares and roots of 12991209

12991209 squared (12991209²) is 168771511281681
12991209 cubed (12991209³) is 2192545976306175742329
The square root of 12991209 is 3604.3319769411
The cube root of 12991209 is 235.0804553251

Scales and comparisons

How big is 12991209?

12,991,209 seconds is equal to 21 weeks, 3 days, 8 hours, 40 minutes, 9 seconds.
To count from 1 to 12,991,209 would take you about thirty-two weeks!

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 12991209 cubic inches would be around 19.6 feet tall.

Recreational maths with 12991209

12991209 backwards is 90219921
12991209 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 12991209's digits is 33
More coming soon!

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The information we have on file for 12991209 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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