198259843 has 4 divisors (see below), whose sum is σ = 198300240. Its totient is φ = 198219448.

The previous prime is 198259819. The next prime is 198259861. The reversal of 198259843 is 348952891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198259843 - 2⁹ = 198259331 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198259543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11623 + ... + 23056.

It is an arithmetic number, because the mean of its divisors is an integer number (49575060).

Almost surely, 2^198259843 is an apocalyptic number.

198259843 is a deficient number, since it is larger than the sum of its proper divisors (40397).

198259843 is an equidigital number, since it uses as much as digits as its factorization.

198259843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40396.

The product of its digits is 622080, while the sum is 49.

The square root of 198259843 is about 14080.4773711689. The cubic root of 198259843 is about 583.1025213289.

The spelling of 198259843 in words is "one hundred ninety-eight million, two hundred fifty-nine thousand, eight hundred forty-three".