198344191 has 4 divisors (see below), whose sum is σ = 199081800. Its totient is φ = 197606584.

The previous prime is 198344189. The next prime is 198344213. The reversal of 198344191 is 191443891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191443891 = 379 ⋅505129.

It is a cyclic number.

It is not a de Polignac number, because 198344191 - 2¹ = 198344189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198344171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368401 + ... + 368938.

It is an arithmetic number, because the mean of its divisors is an integer number (49770450).

Almost surely, 2^198344191 is an apocalyptic number.

198344191 is a deficient number, since it is larger than the sum of its proper divisors (737609).

198344191 is an equidigital number, since it uses as much as digits as its factorization.

198344191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737608.

The product of its digits is 31104, while the sum is 40.

The square root of 198344191 is about 14083.4722636145. The cubic root of 198344191 is about 583.1852016429.

It can be divided in two parts, 19834 and 4191, that added together give a square (24025 = 155²).

The spelling of 198344191 in words is "one hundred ninety-eight million, three hundred forty-four thousand, one hundred ninety-one".