198338091 has 8 divisors (see below), whose sum is σ = 302229504. Its totient is φ = 113336040.

The previous prime is 198338087. The next prime is 198338113. The reversal of 198338091 is 190833891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198338091 - 2² = 198338087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198338071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4722315 + ... + 4722356.

It is an arithmetic number, because the mean of its divisors is an integer number (37778688).

Almost surely, 2^198338091 is an apocalyptic number.

198338091 is a deficient number, since it is larger than the sum of its proper divisors (103891413).

198338091 is an equidigital number, since it uses as much as digits as its factorization.

198338091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444681.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 198338091 is about 14083.2556960385. The cubic root of 198338091 is about 583.1792230354.

The spelling of 198338091 in words is "one hundred ninety-eight million, three hundred thirty-eight thousand, ninety-one".