198099389 has 2 divisors, whose sum is σ = 198099390. Its totient is φ = 198099388.

The previous prime is 198099383. The next prime is 198099449. The reversal of 198099389 is 983990891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170746489 + 27352900 = 13067^2 + 5230^2 .

It is a cyclic number.

It is not a de Polignac number, because 198099389 - 2⁸ = 198099133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198099383) 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 as a sum of consecutive naturals, namely, 99049694 + 99049695.

It is an arithmetic number, because the mean of its divisors is an integer number (99049695).

Almost surely, 2^198099389 is an apocalyptic number.

It is an amenable number.

198099389 is a deficient number, since it is larger than the sum of its proper divisors (1).

198099389 is an equidigital number, since it uses as much as digits as its factorization.

198099389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The square root of 198099389 is about 14074.7784707256. The cubic root of 198099389 is about 582.9451749866.

The spelling of 198099389 in words is "one hundred ninety-eight million, ninety-nine thousand, three hundred eighty-nine".