The Number
81689
Eighty-One Thousand Six Hundred and Eighty-Nine
In Base 28 Octovigesimal Is
3k5d28
The numbers with a 28 subscript use Base 28 Octovigesimal notation.
For more familiar numbers: See Eighty-One Thousand Six Hundred and Eighty-Nine in Base 10 Decimal
Nearby Numbers
Positive, nonzero integers within three units
Scientific Notation
Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.
8.1689e4
Reciprocal
A number multiplied with its reciprocal is one.
0.0007ej2a4984ho28
The reciprocal of 81689 in Base 28 Octovigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 3k5d28 is not a palindrome.
A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Eighty-one thousand six hundred and eighty-nine is the 7990th prime number. See primes in Base 28 Octovigesimal
Not A Composite
Composites have more than just these two factors.
Eighty-One Thousand Six Hundred and Eighty-Nine is not a composite number because it has exactly two factors: One and Eighty-One Thousand Six Hundred and Eighty-Nine
Prime Factors
The number eighty-one thousand six hundred and eighty-nine has the following 1 prime factor:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
3k5d281
= 3k5d28
Base Conversions
The number eighty-one thousand six hundred and eighty-nine in 35 different bases