198411191 has 16 divisors (see below), whose sum is σ = 224142336. Its totient is φ = 174000000.

The previous prime is 198411151. The next prime is 198411221. The reversal of 198411191 is 191114891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198411191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198411121) 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 15 ways as a sum of consecutive naturals, for example, 136016 + ... + 137466.

It is an arithmetic number, because the mean of its divisors is an integer number (14008896).

Almost surely, 2^198411191 is an apocalyptic number.

198411191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198411191 is a deficient number, since it is larger than the sum of its proper divisors (25731145).

198411191 is a wasteful number, since it uses less digits than its factorization.

198411191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894.

The product of its digits is 2592, while the sum is 35.

The square root of 198411191 is about 14085.8507375309. The cubic root of 198411191 is about 583.2508602496.

It can be divided in two parts, 1984 and 11191, that multiplied together give a square (22202944 = 4712²).

The spelling of 198411191 in words is "one hundred ninety-eight million, four hundred eleven thousand, one hundred ninety-one".