🌐EnglishEnglishDeutschEspañolFrançaisPortuguêsSvenskaTiếng ViệtРусскийEntityQ1418543· pop 9· linked from 219 articlesGiuga numbercomposite number n such that p divides n/p − 1 for every prime divisor p of nAvailable in 9 languagesEspañolFrançaisDeutschРусскийFinnishHungarianSvenskaTiếng Việtvia Wikidata sitelinks · CC0Connectionsprime numberEntityfigurate numberEntityCategoriesInteger sequencesUnsolved problems in number theory