198894609 has 15 divisors (see below), whose sum is σ = 297303897. Its totient is φ = 132511788.

The previous prime is 198894599. The next prime is 198894623. The reversal of 198894609 is 906498891.

The square root of 198894609 is 14103.

It is a perfect power (a square), and thus also a powerful number.

198894609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198894609 - 2⁹ = 198894097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198894629) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 126144 + ... + 127710.

Almost surely, 2^198894609 is an apocalyptic number.

198894609 is the 14103-rd square number.

198894609 is the 7052-nd centered octagonal number.

It is an amenable number.

198894609 is a deficient number, since it is larger than the sum of its proper divisors (98409288).

198894609 is an frugal number, since it uses more digits than its factorization.

198894609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The cubic root of 198894609 is about 583.7241623248.

The spelling of 198894609 in words is "one hundred ninety-eight million, eight hundred ninety-four thousand, six hundred nine".