198669 has 8 divisors (see below), whose sum is σ = 270720. Its totient is φ = 129536.

The previous prime is 198659. The next prime is 198673. The reversal of 198669 is 966891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198669 - 2⁵ = 198637 is a prime.

It is a super-2 number, since 2×198669² = 78938743122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564 + ... + 845.

It is an arithmetic number, because the mean of its divisors is an integer number (33840).

2¹⁹⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

198669 is a deficient number, since it is larger than the sum of its proper divisors (72051).

198669 is a wasteful number, since it uses less digits than its factorization.

198669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459.

The product of its digits is 23328, while the sum is 39.

The square root of 198669 is about 445.7230081564. The cubic root of 198669 is about 58.3503369932.

The spelling of 198669 in words is "one hundred ninety-eight thousand, six hundred sixty-nine".