The Number
1987
One Thousand Nine Hundred and Eighty-Seven
In Base 21 Unovigesimal Is
4ad21
The numbers with a 21 subscript use Base 21 Unovigesimal notation.
For more familiar numbers: See One Thousand Nine Hundred and Eighty-Seven 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.
1.987e3
Reciprocal
A number multiplied with its reciprocal is one.
0.004di8d24824h921
The reciprocal of 1987 in Base 21 Unovigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 4ad21 is not 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 eighty-seven is the 300th prime number. See primes in Base 21 Unovigesimal
Not A Composite
Composites have more than just these two factors.
One Thousand Nine Hundred and Eighty-Seven is not a composite number because it has exactly two factors: One and One Thousand Nine Hundred and Eighty-Seven
Prime Factors
The number one thousand nine hundred and eighty-seven 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
4ad211
= 4ad21
Base Conversions
The number one thousand nine hundred and eighty-seven in 35 different bases