1891

1,891 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1891 look like?

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

1891 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 1891:

31 × 61

See below for interesting mathematical facts about the number 1891 from the Numbermatics database.

Names of 1891

Cardinal: 1891 can be written as One thousand, eight hundred ninety-one.

Scientific notation

Scientific notation: 1.891 × 10³

Factors of 1891

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 92

Divisors of 1891

Number of divisors d(n): 4
Complete list of divisors:
1 31 61 1891
Sum of all divisors σ(n): 1984
Sum of proper divisors (its aliquot sum) s(n): 93
1891 is a deficient number, because the sum of its proper divisors (93) is less than itself. Its deficiency is 1798

Bases of 1891

Binary: 11101100011₂
Hexadecimal: 0x763
Base-36: 1GJ

Squares and roots of 1891

1891 squared (1891²) is 3575881
1891 cubed (1891³) is 6761990971
The square root of 1891 is 43.4856298103
The cube root of 1891 is 12.3660360891

Scales and comparisons

How big is 1891?

1,891 seconds is equal to 31 minutes, 31 seconds.
To count from 1 to 1,891 would take you about thirty-one 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 1891 cubic inches would be around 1 feet tall.

Recreational maths with 1891

1891 backwards is 1981
The number of decimal digits it has is: 4
The sum of 1891's digits is 19
More coming soon!

Copy this link to share with anyone:

Share this page on social media:

Link to this page

HTML: To link to this page, just copy and paste the link below into your blog, web page or email.

<a href="https://numbermatics.com/n/1891/?utm_source=shared">Number 1891 - Facts about the integer</a>

BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:

[url=https://numbermatics.com/n/1891/?utm_source=shared]Number 1891 - Facts about the integer[/url]

Cite this page

MLA style:
"Number 1891 - Facts about the integer". Numbermatics.com. 2023. Web. 22 September 2023.

APA style:
Numbermatics. (2023). Number 1891 - Facts about the integer. Retrieved 22 September 2023, from https://numbermatics.com/n/1891/

Chicago style:
Numbermatics. 2023. "Number 1891 - Facts about the integer". https://numbermatics.com/n/1891/

The information we have on file for 1891 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!

Keywords: Divisors of 1891, math, Factors of 1891, curriculum, school, college, exams, university, Prime factorization of 1891, STEM, science, technology, engineering, physics, economics, calculator, one thousand, eight hundred ninety-one.