198791585 has 8 divisors (see below), whose sum is σ = 251105280. Its totient is φ = 150663024.

The previous prime is 198791581. The next prime is 198791603. The reversal of 198791585 is 585197891.

It is a happy number.

198791585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198791585 - 2² = 198791581 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198791581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046177 + ... + 1046366.

It is an arithmetic number, because the mean of its divisors is an integer number (31388160).

Almost surely, 2^198791585 is an apocalyptic number.

It is an amenable number.

198791585 is a deficient number, since it is larger than the sum of its proper divisors (52313695).

198791585 is a wasteful number, since it uses less digits than its factorization.

198791585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092567.

The product of its digits is 907200, while the sum is 53.

The square root of 198791585 is about 14099.3469706934. The cubic root of 198791585 is about 583.6233585460.

The spelling of 198791585 in words is "one hundred ninety-eight million, seven hundred ninety-one thousand, five hundred eighty-five".