The Number
1999
One Thousand Nine Hundred and Ninety-Nine
In Base 21 Unovigesimal Is
4b421
The numbers with a 21 subscript use Base 21 Unovigesimal notation.
For more familiar numbers: See One Thousand Nine Hundred and Ninety-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.
1.999e3
Reciprocal
A number multiplied with its reciprocal is one.
0.004d61ag2d7hc1c21
The reciprocal of 1999 in Base 21 Unovigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 4b421 is a palindrome.
A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
One thousand nine hundred and ninety-nine is the 303rd prime number. See primes in Base 21 Unovigesimal
Not A Composite
Composites have more than just these two factors.
One Thousand Nine Hundred and Ninety-Nine is not a composite number because it has exactly two factors: One and One Thousand Nine Hundred and Ninety-Nine
Prime Factors
The number one thousand nine hundred and ninety-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
4b4211
= 4b421
Base Conversions
The number one thousand nine hundred and ninety-nine in 35 different bases