Adding to 99900000 its reverse (999), we get a palindrome (99900999).
99900000 divided by its reverse (999) gives a 5-th power (100000 = 105).
It is a tau number, because it is divible by the number of its divisors (288).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
Almost surely, 299900000 is an apocalyptic number.
99900000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 99900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187019280).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
99900000 is an equidigital number, since it uses as much as digits as its factorization.
99900000 is an odious number, because the sum of its binary digits is odd.
The square root of 99900000 is about 9994.9987493746. The cubic root of 99900000 is about 464.0041121316.
The spelling of 99900000 in words is "ninety-nine million, nine hundred thousand".