87
Everything about the number 87 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 87
| Nominal | 87 |
| Cardinal | eighty-seven |
| Ordinal | 87th |
| This number as US currency | eighty-seven dollars |
Properties (and some facts) of 87
| Is 87 an odd number? | 87 is an odd number |
| Is 87 an even number? | 87 is not an even number |
| Is 87 a palindrome? | 87 is not a palindrome |
| Is 87 a triangle number? | 87 is not a triangle number |
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87 in other bases
| Base 2 (Binary) | 1010111 |
| Base 3 (Ternary) | 10020 |
| Base 4 (Quaternary) | 1113 |
| Base 5 (Quinary) | 322 |
| Base 6 (Senary) | 223 |
| Base 8 (Octal) | 127 |
| Base 12 (Duodecimal) | 73 |
| Base 16 (Hexadecimal) | 57 |
| Base 20 (Vigesimal) | 47 |
Primes and factors tests for 87
| Is 87 a prime number? | 87 is not a prime number |
| Is 87 a perfect number? | 87 is not a perfect number |
| Is 87 a Mersenne prime? | 87 is not a Mersenne prime |
| Is 87 a Fermat prime? | 87 is not a Fermat prime |
| Is 87 a Fibonacci prime? | 87 is not a Fibonacci prime |
| Is 87 a partition prime? | 87 is not a partition prime |
| Is 87 a Pell prime? | 87 is not a Pell prime |
| Prime Factors | Prime factors of 87 |
87 in other numeral systems
| 87 in Roman numerals | LXXXVII |
| 87 in Chinese numerals | 捌拾柒 |
| 87 in Babylonian numerals |   |
| 87 in Egyptian numerals | 𓎍𓐀 |
Roots and squares for 87
| Is 87 a square number? | 87 is not a square number |
| Is 87 a cube number? | 87 is not a cube number |
| Square root of 87 | 9.3273790530888 |
| Cube root of 87 | 4.4310476216936 |
Recreational math for 87
| Number 87 reversed | 78 |
| Sum of the digits | 15 |
| Number of digits | 2 |
Arithmetic tables for 87
Other pages about 87
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