198916603 has 2 divisors, whose sum is σ = 198916604. Its totient is φ = 198916602.

The previous prime is 198916589. The next prime is 198916637. The reversal of 198916603 is 306619891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198916603 - 2²¹ = 196819451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198916603.

It is not a weakly prime, because it can be changed into another prime (198910603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99458301 + 99458302.

It is an arithmetic number, because the mean of its divisors is an integer number (99458302).

Almost surely, 2^198916603 is an apocalyptic number.

198916603 is a deficient number, since it is larger than the sum of its proper divisors (1).

198916603 is an equidigital number, since it uses as much as digits as its factorization.

198916603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 198916603 is about 14103.7797416154. The cubic root of 198916603 is about 583.7456778335.

The spelling of 198916603 in words is "one hundred ninety-eight million, nine hundred sixteen thousand, six hundred three".