198908811 has 8 divisors (see below), whose sum is σ = 294679760. Its totient is φ = 132605856.

The previous prime is 198908791. The next prime is 198908813. The reversal of 198908811 is 118809891.

It is not a de Polignac number, because 198908811 - 2⁵ = 198908779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198908813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3683470 + ... + 3683523.

It is an arithmetic number, because the mean of its divisors is an integer number (36834970).

Almost surely, 2^198908811 is an apocalyptic number.

198908811 is a deficient number, since it is larger than the sum of its proper divisors (95770949).

198908811 is an equidigital number, since it uses as much as digits as its factorization.

198908811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367002 (or 7366996 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 45.

The square root of 198908811 is about 14103.5035009036. The cubic root of 198908811 is about 583.7380555340.

The spelling of 198908811 in words is "one hundred ninety-eight million, nine hundred eight thousand, eight hundred eleven".