198009533 has 4 divisors (see below), whose sum is σ = 203361180. Its totient is φ = 192657888.

The previous prime is 198009529. The next prime is 198009547. The reversal of 198009533 is 335900891.

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 76965529 + 121044004 = 8773^2 + 11002^2 .

It is a cyclic number.

It is not a de Polignac number, because 198009533 - 2² = 198009529 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198009563) 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, 2675768 + ... + 2675841.

It is an arithmetic number, because the mean of its divisors is an integer number (50840295).

Almost surely, 2^198009533 is an apocalyptic number.

It is an amenable number.

198009533 is a deficient number, since it is larger than the sum of its proper divisors (5351647).

198009533 is an equidigital number, since it uses as much as digits as its factorization.

198009533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5351646.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 198009533 is about 14071.5860157979. The cubic root of 198009533 is about 582.8570221932.

The spelling of 198009533 in words is "one hundred ninety-eight million, nine thousand, five hundred thirty-three".