198434927 has 2 divisors, whose sum is σ = 198434928. Its totient is φ = 198434926.

The previous prime is 198434909. The next prime is 198434963. The reversal of 198434927 is 729434891.

It is a weak prime.

It is an emirp because it is prime and its reverse (729434891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198434927 - 2⁸ = 198434671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198434227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99217463 + 99217464.

It is an arithmetic number, because the mean of its divisors is an integer number (99217464).

Almost surely, 2^198434927 is an apocalyptic number.

198434927 is a deficient number, since it is larger than the sum of its proper divisors (1).

198434927 is an equidigital number, since it uses as much as digits as its factorization.

198434927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 198434927 is about 14086.6932599528. The cubic root of 198434927 is about 583.2741174902.

The spelling of 198434927 in words is "one hundred ninety-eight million, four hundred thirty-four thousand, nine hundred twenty-seven".