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a self number in base 10, since there is no integer that added to its own digits, adds up to 97. [3] the smallest odd prime that is not a cluster prime. [4] the highest two-digit number where the sum of its digits is a square. the number of primes <= 2 9. [5] The numbers 97, 907, 9007, 90007 and 900007 are all primes, and they are all happy primes.
A circular prime number is a number that remains prime on any cyclic rotation of its digits (in base 10). ... 17, 41, 73, 89, 97, 113, 137, 193, ... Mathematics portal;
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself. However, 4 is composite because it is a ...
A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.
An author named Leslie E. Card in early volumes of the Journal of Recreational Mathematics ... an odd number of digits. The largest is the 97-digit prime ...
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Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]