198085519 has 4 divisors (see below), whose sum is σ = 199230696. Its totient is φ = 196940344.

The previous prime is 198085471. The next prime is 198085523. The reversal of 198085519 is 915580891.

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

It is a cyclic number.

It is not a de Polignac number, because 198085519 - 2¹⁷ = 197954447 is a prime.

It is a super-2 number, since 2×198085519² = 78475745674998722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198085529) 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, 572329 + ... + 572674.

It is an arithmetic number, because the mean of its divisors is an integer number (49807674).

Almost surely, 2^198085519 is an apocalyptic number.

198085519 is a deficient number, since it is larger than the sum of its proper divisors (1145177).

198085519 is a wasteful number, since it uses less digits than its factorization.

198085519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145176.

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 198085519 is about 14074.2857367612. The cubic root of 198085519 is about 582.9315696303.

The spelling of 198085519 in words is "one hundred ninety-eight million, eighty-five thousand, five hundred nineteen".