9901198 has 4 divisors (see below), whose sum is σ = 14851800. Its totient is φ = 4950598.

The previous prime is 9901189. The next prime is 9901211. The reversal of 9901198 is 8911099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8911099 = 97 ⋅91867.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475298 + ... + 2475301.

It is an arithmetic number, because the mean of its divisors is an integer number (3712950).

Almost surely, 2^9901198 is an apocalyptic number.

9901198 is a deficient number, since it is larger than the sum of its proper divisors (4950602).

9901198 is a wasteful number, since it uses less digits than its factorization.

9901198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950601.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 9901198 is about 3146.6169134485. The cubic root of 9901198 is about 214.7315777665.

Subtracting from 9901198 its reverse (8911099), we obtain a palindrome (990099).

The spelling of 9901198 in words is "nine million, nine hundred one thousand, one hundred ninety-eight".