198543379 has 4 divisors (see below), whose sum is σ = 198623584. Its totient is φ = 198463176.

The previous prime is 198543329. The next prime is 198543403. The reversal of 198543379 is 973345891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 973345891 = 7 ⋅139049413.

It is a cyclic number.

It is not a de Polignac number, because 198543379 - 2¹⁹ = 198019091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198543329) 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, 36267 + ... + 41380.

It is an arithmetic number, because the mean of its divisors is an integer number (49655896).

Almost surely, 2^198543379 is an apocalyptic number.

198543379 is a deficient number, since it is larger than the sum of its proper divisors (80205).

198543379 is an equidigital number, since it uses as much as digits as its factorization.

198543379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80204.

The product of its digits is 816480, while the sum is 49.

The square root of 198543379 is about 14090.5421826131. The cubic root of 198543379 is about 583.3803584040.

The spelling of 198543379 in words is "one hundred ninety-eight million, five hundred forty-three thousand, three hundred seventy-nine".