9999198 has 36 divisors (see below), whose sum is σ = 23818704. Its totient is φ = 3029400.

The previous prime is 9999193. The next prime is 9999217. The reversal of 9999198 is 8919999.

9999198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999193) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 118 + ... + 4473.

Almost surely, 2^9999198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11909352).

9999198 is an abundant number, since it is smaller than the sum of its proper divisors (13819506).

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

9999198 is a wasteful number, since it uses less digits than its factorization.

9999198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621 (or 4607 counting only the distinct ones).

The product of its digits is 472392, while the sum is 54.

The square root of 9999198 is about 3162.1508502916. The cubic root of 9999198 is about 215.4377093271.

The spelling of 9999198 in words is "nine million, nine hundred ninety-nine thousand, one hundred ninety-eight".