198840329 has 4 divisors (see below), whose sum is σ = 201074580. Its totient is φ = 196606080.

The previous prime is 198840319. The next prime is 198840349. The reversal of 198840329 is 923048891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923048891 = 149 ⋅6194959.

It can be written as a sum of positive squares in 2 ways, for example, as 63234304 + 135606025 = 7952^2 + 11645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198840329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198840329.

It is not an unprimeable number, because it can be changed into a prime (198840319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116992 + ... + 1117169.

It is an arithmetic number, because the mean of its divisors is an integer number (50268645).

Almost surely, 2^198840329 is an apocalyptic number.

It is an amenable number.

198840329 is a deficient number, since it is larger than the sum of its proper divisors (2234251).

198840329 is an equidigital number, since it uses as much as digits as its factorization.

198840329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234250.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 198840329 is about 14101.0754554396. The cubic root of 198840329 is about 583.6710564271.

The spelling of 198840329 in words is "one hundred ninety-eight million, eight hundred forty thousand, three hundred twenty-nine".