Number of the day: 818983

Properties of the number 818983:

818983 = 11 × 74453 is semiprime and squarefree.
818983 has 2 distinct prime factors, 4 divisors, 23 antidivisors and 744520 totatives.
818983 has an emirp digit sum 37 in base 10.
818983 = 409492² - 409491² = 37232² - 37221² is the difference of 2 nonnegative squares in 2 ways.
818983 is the sum of 2 positive triangular numbers.
818983 is the difference of 2 positive pentagonal numbers in 2 ways.
818983 is not the sum of 3 positive squares.
818983² = 375375² + 727892² is the sum of 2 positive squares in 1 way.
818983² is the sum of 3 positive squares.
818983 is a divisor of 617²⁶⁵⁹ - 1.
818983 is an emirpimes in (at least) the following bases: 4, 11, 14, 15, 20, 22, 27, 29, 30, 31, 33, 36, 37, 41, 48, 49, 53, 54, 59, 66, 69, 73, 76, 77, 78, 82, 83, 86, 88, 89, 93, and 95.