198869329 has 2 divisors, whose sum is σ = 198869330. Its totient is φ = 198869328.

The previous prime is 198869317. The next prime is 198869357. The reversal of 198869329 is 923968891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191767104 + 7102225 = 13848^2 + 2665^2 .

It is a cyclic number.

It is not a de Polignac number, because 198869329 - 2¹⁷ = 198738257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198869329.

It is not a weakly prime, because it can be changed into another prime (198869369) 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 as a sum of consecutive naturals, namely, 99434664 + 99434665.

It is an arithmetic number, because the mean of its divisors is an integer number (99434665).

Almost surely, 2^198869329 is an apocalyptic number.

It is an amenable number.

198869329 is a deficient number, since it is larger than the sum of its proper divisors (1).

198869329 is an equidigital number, since it uses as much as digits as its factorization.

198869329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 55.

The square root of 198869329 is about 14102.1037083125. The cubic root of 198869329 is about 583.6994303455.

It can be divided in two parts, 1988 and 69329, that added together give a palindrome (71317).

The spelling of 198869329 in words is "one hundred ninety-eight million, eight hundred sixty-nine thousand, three hundred twenty-nine".