198089065 has 4 divisors (see below), whose sum is σ = 237706884. Its totient is φ = 158471248.

The previous prime is 198089063. The next prime is 198089107. The reversal of 198089065 is 560980891.

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 52838361 + 145250704 = 7269^2 + 12052^2 .

It is a cyclic number.

It is not a de Polignac number, because 198089065 - 2¹ = 198089063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198089063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19808902 + ... + 19808911.

It is an arithmetic number, because the mean of its divisors is an integer number (59426721).

Almost surely, 2^198089065 is an apocalyptic number.

It is an amenable number.

198089065 is a deficient number, since it is larger than the sum of its proper divisors (39617819).

198089065 is an equidigital number, since it uses as much as digits as its factorization.

198089065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39617818.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 198089065 is about 14074.4117106187. The cubic root of 198089065 is about 582.9350480320.

The spelling of 198089065 in words is "one hundred ninety-eight million, eighty-nine thousand, sixty-five".