It is a sphenic number, since it is the product of 3 distinct primes.
99999726 is an admirable number.
It is a self number, because there is not a number n which added to its sum of digits gives 99999726.
It is a congruent number.
Almost surely, 299999726 is an apocalyptic number.
99999726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
99999726 is a wasteful number, since it uses less digits than its factorization.
99999726 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 16666626.
The square root of 99999726 is about 9999.9862999906. The cubic root of 99999726 is about 464.1584594291.
The spelling of 99999726 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred twenty-six".