198409329 has 48 divisors (see below), whose sum is σ = 317837520. Its totient is φ = 118702080.

The previous prime is 198409327. The next prime is 198409357. The reversal of 198409329 is 923904891.

It can be written as a sum of positive squares in 8 ways, for example, as 360000 + 198049329 = 600^2 + 14073^2 .

It is not a de Polignac number, because 198409329 - 2¹ = 198409327 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198409327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 430159 + ... + 430619.

It is an arithmetic number, because the mean of its divisors is an integer number (6621615).

Almost surely, 2^198409329 is an apocalyptic number.

It is an amenable number.

198409329 is a deficient number, since it is larger than the sum of its proper divisors (119428191).

198409329 is a wasteful number, since it uses less digits than its factorization.

198409329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 198409329 is about 14085.7846426814. The cubic root of 198409329 is about 583.2490357280.

The spelling of 198409329 in words is "one hundred ninety-eight million, four hundred nine thousand, three hundred twenty-nine".