198361585 has 4 divisors (see below), whose sum is σ = 238033908. Its totient is φ = 158689264.

The previous prime is 198361547. The next prime is 198361601. The reversal of 198361585 is 585163891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 585163891 = 13 ⋅45012607.

It can be written as a sum of positive squares in 2 ways, for example, as 23804641 + 174556944 = 4879^2 + 13212^2 .

It is a cyclic number.

It is not a de Polignac number, because 198361585 - 2¹¹ = 198359537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19836154 + ... + 19836163.

It is an arithmetic number, because the mean of its divisors is an integer number (59508477).

Almost surely, 2^198361585 is an apocalyptic number.

It is an amenable number.

198361585 is a deficient number, since it is larger than the sum of its proper divisors (39672323).

198361585 is an equidigital number, since it uses as much as digits as its factorization.

198361585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39672322.

The product of its digits is 259200, while the sum is 46.

The square root of 198361585 is about 14084.0897824460. The cubic root of 198361585 is about 583.2022488220.

The spelling of 198361585 in words is "one hundred ninety-eight million, three hundred sixty-one thousand, five hundred eighty-five".