198434903 has 2 divisors, whose sum is σ = 198434904. Its totient is φ = 198434902.

The previous prime is 198434861. The next prime is 198434909. The reversal of 198434903 is 309434891.

It is a strong prime.

It is an emirp because it is prime and its reverse (309434891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198434903 - 2⁶ = 198434839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198434909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99217451 + 99217452.

It is an arithmetic number, because the mean of its divisors is an integer number (99217452).

Almost surely, 2^198434903 is an apocalyptic number.

198434903 is a deficient number, since it is larger than the sum of its proper divisors (1).

198434903 is an equidigital number, since it uses as much as digits as its factorization.

198434903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 198434903 is about 14086.6924080850. The cubic root of 198434903 is about 583.2740939752.

The spelling of 198434903 in words is "one hundred ninety-eight million, four hundred thirty-four thousand, nine hundred three".