198895489 has 4 divisors (see below), whose sum is σ = 214195156. Its totient is φ = 183595824.

The previous prime is 198895483. The next prime is 198895507. The reversal of 198895489 is 984598891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984598891 = 5717 ⋅172223.

It can be written as a sum of positive squares in 2 ways, for example, as 92640625 + 106254864 = 9625^2 + 10308^2 .

It is a cyclic number.

It is not a de Polignac number, because 198895489 - 2⁵ = 198895457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198895483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7649814 + ... + 7649839.

It is an arithmetic number, because the mean of its divisors is an integer number (53548789).

Almost surely, 2^198895489 is an apocalyptic number.

It is an amenable number.

198895489 is a deficient number, since it is larger than the sum of its proper divisors (15299667).

198895489 is a wasteful number, since it uses less digits than its factorization.

198895489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299666.

The product of its digits is 7464960, while the sum is 61.

The square root of 198895489 is about 14103.0311990012. The cubic root of 198895489 is about 583.7250232104.

The spelling of 198895489 in words is "one hundred ninety-eight million, eight hundred ninety-five thousand, four hundred eighty-nine".