198330889 has 3 divisors (see below), whose sum is σ = 198344973. Its totient is φ = 198316806.

The previous prime is 198330877. The next prime is 198330917. The reversal of 198330889 is 988033891.

The square root of 198330889 is 14083.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 198330889 - 2¹⁷ = 198199817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198330809) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7042 + ... + 21124.

It is an arithmetic number, because the mean of its divisors is an integer number (66114991).

Almost surely, 2^198330889 is an apocalyptic number.

198330889 is the 14083-rd square number.

198330889 is the 7042-nd centered octagonal number.

It is an amenable number.

198330889 is a deficient number, since it is larger than the sum of its proper divisors (14084).

198330889 is an frugal number, since it uses more digits than its factorization.

198330889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28166 (or 14083 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 49.

The cubic root of 198330889 is about 583.1721642003.

Multiplying 198330889 by its sum of digits (49), we get a square (9718213561 = 98581²).

The spelling of 198330889 in words is "one hundred ninety-eight million, three hundred thirty thousand, eight hundred eighty-nine".