9978799 is nontrivially palindromic in base 10.
9978799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a palprime.
It is a cyclic number.
It is a congruent number.
Almost surely, 29978799 is an apocalyptic number.
9978799 is an equidigital number, since it uses as much as digits as its factorization.
9978799 is an evil number, because the sum of its binary digits is even.
The square root of 9978799 is about 3158.9237091136. The cubic root of 9978799 is about 215.2911073789.
The spelling of 9978799 in words is "nine million, nine hundred seventy-eight thousand, seven hundred ninety-nine".