99999798 has 16 divisors (see below), whose sum is σ = 200131776. Its totient is φ = 33311240.

The previous prime is 99999787. The next prime is 99999821. The reversal of 99999798 is 89799999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6265 + ... + 15467.

It is an arithmetic number, because the mean of its divisors is an integer number (12508236).

Almost surely, 2^99999798 is an apocalyptic number.

99999798 is an abundant number, since it is smaller than the sum of its proper divisors (100131978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999798 is a wasteful number, since it uses less digits than its factorization.

99999798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11019.

The product of its digits is 29760696, while the sum is 69.

The square root of 99999798 is about 9999.9898999949. The cubic root of 99999798 is about 464.1585708274.

The spelling of 99999798 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred ninety-eight".