198614591 has 48 divisors (see below), whose sum is σ = 256089600. Its totient is φ = 153058752.

The previous prime is 198614573. The next prime is 198614609. The reversal of 198614591 is 195416891.

It is an interprime number because it is at equal distance from previous prime (198614573) and next prime (198614609).

It is a de Polignac number, because none of the positive numbers 2^k-198614591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198614501) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1928246 + ... + 1928348.

It is an arithmetic number, because the mean of its divisors is an integer number (5335200).

Almost surely, 2^198614591 is an apocalyptic number.

198614591 is a deficient number, since it is larger than the sum of its proper divisors (57475009).

198614591 is a wasteful number, since it uses less digits than its factorization.

198614591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 221 counting only the distinct ones).

The product of its digits is 77760, while the sum is 44.

The square root of 198614591 is about 14093.0688992852. The cubic root of 198614591 is about 583.4500975150.

The spelling of 198614591 in words is "one hundred ninety-eight million, six hundred fourteen thousand, five hundred ninety-one".