198011633 has 4 divisors (see below), whose sum is σ = 198057588. Its totient is φ = 197965680.

The previous prime is 198011621. The next prime is 198011659. The reversal of 198011633 is 336110891.

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 131148304 + 66863329 = 11452^2 + 8177^2 .

It is a cyclic number.

It is not a de Polignac number, because 198011633 - 2⁸ = 198011377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198011633.

It is not an unprimeable number, because it can be changed into a prime (198011533) 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, 15758 + ... + 25383.

It is an arithmetic number, because the mean of its divisors is an integer number (49514397).

Almost surely, 2^198011633 is an apocalyptic number.

It is an amenable number.

198011633 is a deficient number, since it is larger than the sum of its proper divisors (45955).

198011633 is an equidigital number, since it uses as much as digits as its factorization.

198011633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45954.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 198011633 is about 14071.6606340545. The cubic root of 198011633 is about 582.8590826924.

The spelling of 198011633 in words is "one hundred ninety-eight million, eleven thousand, six hundred thirty-three".