198438175379 has 2 divisors, whose sum is σ = 198438175380. Its totient is φ = 198438175378.

The previous prime is 198438175357. The next prime is 198438175391. The reversal of 198438175379 is 973571834891.

198438175379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198438175379 - 2²⁰ = 198437126803 is a prime.

It is not a weakly prime, because it can be changed into another prime (198438175079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99219087689 + 99219087690.

It is an arithmetic number, because the mean of its divisors is an integer number (99219087690).

Almost surely, 2^198438175379 is an apocalyptic number.

198438175379 is a deficient number, since it is larger than the sum of its proper divisors (1).

198438175379 is an equidigital number, since it uses as much as digits as its factorization.

198438175379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 65.

The spelling of 198438175379 in words is "one hundred ninety-eight billion, four hundred thirty-eight million, one hundred seventy-five thousand, three hundred seventy-nine".