198098015 has 4 divisors (see below), whose sum is σ = 237717624. Its totient is φ = 158478408.

The previous prime is 198097993. The next prime is 198098039. The reversal of 198098015 is 510890891.

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 198098015 - 2¹⁰ = 198096991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19809797 + ... + 19809806.

It is an arithmetic number, because the mean of its divisors is an integer number (59429406).

Almost surely, 2^198098015 is an apocalyptic number.

198098015 is a deficient number, since it is larger than the sum of its proper divisors (39619609).

198098015 is an equidigital number, since it uses as much as digits as its factorization.

198098015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39619608.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 198098015 is about 14074.7296599260. The cubic root of 198098015 is about 582.9438272313.

The spelling of 198098015 in words is "one hundred ninety-eight million, ninety-eight thousand, fifteen".