Number of the day: 216093

Properties of the number 216093:

216093 = 3 × 72031 is semiprime and squarefree.
216093 has 2 distinct prime factors, 4 divisors, 23 antidivisors and 144060 totatives.
216093 has a semiprime digit sum 21 in base 10.
216093 has a Fibonacci digit sum 21 in base 10.
216093 has a triangular digit sum 21 in base 10.
216093 = 108047² - 108046² = 36017² - 36014² is the difference of 2 nonnegative squares in 2 ways.
216093 is the difference of 2 positive pentagonal numbers in 1 way.
216093 = 11² + 26² + 464² is the sum of 3 positive squares.
216093² is the sum of 3 positive squares.
216093 is a proper divisor of 907³⁴³ - 1.
216093 is an emirpimes in (at least) the following bases: 2, 6, 15, 21, 48, 50, 54, 57, 58, 65, 69, 72, 78, 83, 89, 92, 96, 99, and 100.