198398843 has 2 divisors, whose sum is σ = 198398844. Its totient is φ = 198398842.

The previous prime is 198398813. The next prime is 198398867. The reversal of 198398843 is 348893891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198398843 - 2¹⁰ = 198397819 is a prime.

It is not a weakly prime, because it can be changed into another prime (198398813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99199421 + 99199422.

It is an arithmetic number, because the mean of its divisors is an integer number (99199422).

Almost surely, 2^198398843 is an apocalyptic number.

198398843 is a deficient number, since it is larger than the sum of its proper divisors (1).

198398843 is an equidigital number, since it uses as much as digits as its factorization.

198398843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The square root of 198398843 is about 14085.4124185272. The cubic root of 198398843 is about 583.2387605775.

It can be divided in two parts, 19839 and 8843, that added together give a palindrome (28682).

The spelling of 198398843 in words is "one hundred ninety-eight million, three hundred ninety-eight thousand, eight hundred forty-three".