198809667 has 16 divisors (see below), whose sum is σ = 336609280. Its totient is φ = 113605416.

The previous prime is 198809647. The next prime is 198809669. The reversal of 198809667 is 766908891.

198809667 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 198809667 - 2¹² = 198805571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198809669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525763 + ... + 526140.

It is an arithmetic number, because the mean of its divisors is an integer number (21038080).

Almost surely, 2^198809667 is an apocalyptic number.

198809667 is a deficient number, since it is larger than the sum of its proper divisors (137799613).

198809667 is a wasteful number, since it uses less digits than its factorization.

198809667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051919 (or 1051913 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 198809667 is about 14099.9881914844. The cubic root of 198809667 is about 583.6410533890.

The spelling of 198809667 in words is "one hundred ninety-eight million, eight hundred nine thousand, six hundred sixty-seven".