| 词条 | Equidigital number |
| 释义 |
An equidigital number is a natural number that has the same number of digits as the number of digits in its prime factorization, including exponents but excluding exponents equal to 1. For example, in base-10 arithmetic 1, 2, 3, 5, 7, and 10 (2×5) are equidigital numbers {{OEIS|id=A046758}}. All prime numbers are equidigital numbers in any base. A number that is either equidigital or frugal is said to be economical. See also
References
2 : Integer sequences|Base-dependent integer sequences |
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