198213867 has 6 divisors (see below), whose sum is σ = 286308932. Its totient is φ = 132142572.

The previous prime is 198213809. The next prime is 198213887. The reversal of 198213867 is 768312891.

It is not a de Polignac number, because 198213867 - 2⁷ = 198213739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198213887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11011873 + ... + 11011890.

Almost surely, 2^198213867 is an apocalyptic number.

198213867 is a deficient number, since it is larger than the sum of its proper divisors (88095065).

198213867 is a wasteful number, since it uses less digits than its factorization.

198213867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22023769 (or 22023766 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 198213867 is about 14078.8446614060. The cubic root of 198213867 is about 583.0574444680.

The spelling of 198213867 in words is "one hundred ninety-eight million, two hundred thirteen thousand, eight hundred sixty-seven".