9898191 has 6 divisors (see below), whose sum is σ = 14297400. Its totient is φ = 6598788.

The previous prime is 9898177. The next prime is 9898223. The reversal of 9898191 is 1918989.

9898191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9898191 - 2⁵ = 9898159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549891 + ... + 549908.

It is an arithmetic number, because the mean of its divisors is an integer number (2382900).

Almost surely, 2^9898191 is an apocalyptic number.

9898191 is a deficient number, since it is larger than the sum of its proper divisors (4399209).

9898191 is a wasteful number, since it uses less digits than its factorization.

9898191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099805 (or 1099802 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The square root of 9898191 is about 3146.1390624065. The cubic root of 9898191 is about 214.7098375275.

It can be divided in two parts, 989 and 8191, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 9898191 in words is "nine million, eight hundred ninety-eight thousand, one hundred ninety-one".