198443569 has 3 divisors (see below), whose sum is σ = 198457657. Its totient is φ = 198429482.

The previous prime is 198443521. The next prime is 198443573. The reversal of 198443569 is 965344891.

It is a happy number.

The square root of 198443569 is 14087.

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 198443569 - 2²⁷ = 64225841 is a prime.

It is a super-2 number, since 2×198443569² = 78759700154915522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198443519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7044 + ... + 21130.

Almost surely, 2^198443569 is an apocalyptic number.

198443569 is the 14087-th square number.

198443569 is the 7044-th centered octagonal number.

It is an amenable number.

198443569 is a deficient number, since it is larger than the sum of its proper divisors (14088).

198443569 is an frugal number, since it uses more digits than its factorization.

198443569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28174 (or 14087 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The cubic root of 198443569 is about 583.2825847189.

Multiplying 198443569 by its sum of digits (49), we get a square (9723734881 = 98609²).

The spelling of 198443569 in words is "one hundred ninety-eight million, four hundred forty-three thousand, five hundred sixty-nine".