198084389 has 4 divisors (see below), whose sum is σ = 204474240. Its totient is φ = 191694540.

The previous prime is 198084377. The next prime is 198084437. The reversal of 198084389 is 983480891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198084389 - 2¹² = 198080293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198084319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3194879 + ... + 3194940.

It is an arithmetic number, because the mean of its divisors is an integer number (51118560).

Almost surely, 2^198084389 is an apocalyptic number.

It is an amenable number.

198084389 is a deficient number, since it is larger than the sum of its proper divisors (6389851).

198084389 is an equidigital number, since it uses as much as digits as its factorization.

198084389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6389850.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 198084389 is about 14074.2455925709. The cubic root of 198084389 is about 582.9304611631.

The spelling of 198084389 in words is "one hundred ninety-eight million, eighty-four thousand, three hundred eighty-nine".