81 is a natural number that comes after 80 and before 82. It is notable because it equals 3 to the fourth power (3⁴) and is also a perfect square (9 × 9).
AI-generated from the Wikipedia summary — may contain errors.
← 80 81 82 83 84 85 86 87 88 89 → List of numbers Integers
← 0 10 20 30 40 50 60 70 80 90 →
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).