198865369 has 4 divisors (see below), whose sum is σ = 199074996. Its totient is φ = 198655744.

The previous prime is 198865367. The next prime is 198865399. The reversal of 198865369 is 963568891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45427600 + 153437769 = 6740^2 + 12387^2 .

It is a cyclic number.

It is not a de Polignac number, because 198865369 - 2¹ = 198865367 is a prime.

It is a super-2 number, since 2×198865369² = 79094869975012322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198865367) 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 3 ways as a sum of consecutive naturals, for example, 103384 + ... + 105289.

It is an arithmetic number, because the mean of its divisors is an integer number (49768749).

Almost surely, 2^198865369 is an apocalyptic number.

It is an amenable number.

198865369 is a deficient number, since it is larger than the sum of its proper divisors (209627).

198865369 is an equidigital number, since it uses as much as digits as its factorization.

198865369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209626.

The product of its digits is 2799360, while the sum is 55.

The square root of 198865369 is about 14101.9633030298. The cubic root of 198865369 is about 583.6955560007.

The spelling of 198865369 in words is "one hundred ninety-eight million, eight hundred sixty-five thousand, three hundred sixty-nine".