Number of the day: 99678

Properties of the number 99678:

99678 = 2 × 3 × 37 × 449 is the 90115^th composite number and is squarefree.
99678 has 4 distinct prime factors, 16 divisors, 13 antidivisors and 32256 totatives.
99678 has an emirpimes digit sum 39 in base 10.
99678 is the difference of 2 positive pentagonal numbers in 3 ways.
99678 = 22² + 35² + 313² is the sum of 3 positive squares.
99678² = 62160² + 77922² = 53550² + 84072² = 33528² + 93870² = 32328² + 94290² is the sum of 2 positive squares in 4 ways.
99678² is the sum of 3 positive squares.
99678 is a proper divisor of 541²⁴ - 1.
99678 is palindromic in (at least) base -11.

The number 99678 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequences (among others):

Sequence numbers and descriptions below are taken from OEIS.
A064262: Values of m such that N=(am+1)(bm+1)(cm+1) is a Carmichael number, where a,b,c = 1,2,51.
A248534: Number of length n+3 0..5 arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.