198447389 has 8 divisors (see below), whose sum is σ = 227515008. Its totient is φ = 169559280.

The previous prime is 198447383. The next prime is 198447407. The reversal of 198447389 is 983744891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198447389 - 2⁴ = 198447373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198447389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198447383) 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 7 ways as a sum of consecutive naturals, for example, 42497 + ... + 46934.

It is an arithmetic number, because the mean of its divisors is an integer number (28439376).

Almost surely, 2^198447389 is an apocalyptic number.

It is an amenable number.

198447389 is a deficient number, since it is larger than the sum of its proper divisors (29067619).

198447389 is an equidigital number, since it uses as much as digits as its factorization.

198447389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89755.

The product of its digits is 1741824, while the sum is 53.

The square root of 198447389 is about 14087.1355853488. The cubic root of 198447389 is about 583.2863273869.

The spelling of 198447389 in words is "one hundred ninety-eight million, four hundred forty-seven thousand, three hundred eighty-nine".