198104587 has 12 divisors (see below), whose sum is σ = 213131680. Its totient is φ = 184070016.

The previous prime is 198104581. The next prime is 198104593. The reversal of 198104587 is 785401891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (198104581) and next prime (198104593).

It is a de Polignac number, because none of the positive numbers 2^k-198104587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198104581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18493 + ... + 27169.

Almost surely, 2^198104587 is an apocalyptic number.

198104587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

198104587 is a deficient number, since it is larger than the sum of its proper divisors (15027093).

198104587 is an equidigital number, since it uses as much as digits as its factorization.

198104587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790 (or 8773 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 198104587 is about 14074.9631260618. The cubic root of 198104587 is about 582.9502736436.

The spelling of 198104587 in words is "one hundred ninety-eight million, one hundred four thousand, five hundred eighty-seven".