The Number
81649
Eighty-One Thousand Six Hundred and Forty-Nine
In Base 13 Tridecimal Is
2b21913
The numbers with a 13 subscript use Base 13 Tridecimal notation.
For more familiar numbers: See Eighty-One Thousand Six Hundred and Forty-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.
8.1649e4
Reciprocal
A number multiplied with its reciprocal is one.
0.0000471691556c2957513
The reciprocal of 81649 in Base 13 Tridecimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 2b21913 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 forty-nine is the 7986th prime number. See primes in Base 13 Tridecimal
Not A Composite
Composites have more than just these two factors.
Eighty-One Thousand Six Hundred and Forty-Nine is not a composite number because it has exactly two factors: One and Eighty-One Thousand Six Hundred and Forty-Nine
Prime Factors
The number eighty-one thousand six hundred and forty-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
2b219131
= 2b21913
Base Conversions
The number eighty-one thousand six hundred and forty-nine in 35 different bases