"Achilles number" meaning in English

{
  "etymology_text": "Coined by Henry Bottomley after Achilles, a hero of the Trojan War.",
  "forms": [
    {
      "form": "Achilles numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Achilles number (plural Achilles numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
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            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "An integer that is a powerful number but not a perfect power."
      ],
      "id": "en-Achilles_number-en-noun-INyga193",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "integer",
          "integer"
        ],
        [
          "powerful number",
          "powerful number"
        ],
        [
          "perfect power",
          "perfect power"
        ]
      ],
      "raw_glosses": [
        "(mathematics) An integer that is a powerful number but not a perfect power."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Achilles number"
      ]
    }
  ],
  "word": "Achilles number"
}

{
  "etymology_text": "Coined by Henry Bottomley after Achilles, a hero of the Trojan War.",
  "forms": [
    {
      "form": "Achilles numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Achilles number (plural Achilles numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Mathematics"
      ],
      "glosses": [
        "An integer that is a powerful number but not a perfect power."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "integer",
          "integer"
        ],
        [
          "powerful number",
          "powerful number"
        ],
        [
          "perfect power",
          "perfect power"
        ]
      ],
      "raw_glosses": [
        "(mathematics) An integer that is a powerful number but not a perfect power."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Achilles number"
      ]
    }
  ],
  "word": "Achilles number"
}