EntityQ1781115· pop 8· linked from 220 articlesself-descriptive numberSign in to saveb-digit long integer m in a given base b where each digit d at position n counts how many instances of digit n are in mConnectionsprime numberEntityfigurate numberEntityautomorphic numberEntitymathematicsEntityInternational Standard Book NumberEntitynatural numberEntityintegerEntitybinary numeral systemEntitydigitEntityexponentiationEntitynumeral systemEntitythree-dimensional spaceEntitynatural languageEntityperfect numberEntitydivisorEntityrecursionEntitypermutationEntityQ118398Entitysorting algorithmEntityMersenne primeEntityCategoriesBase-dependent integer sequences