198068917 has 2 divisors, whose sum is σ = 198068918. Its totient is φ = 198068916.

The previous prime is 198068903. The next prime is 198068933. The reversal of 198068917 is 719860891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156775441 + 41293476 = 12521^2 + 6426^2 .

It is an emirp because it is prime and its reverse (719860891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198068917 - 2⁷ = 198068789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198068947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99034458 + 99034459.

It is an arithmetic number, because the mean of its divisors is an integer number (99034459).

Almost surely, 2^198068917 is an apocalyptic number.

It is an amenable number.

198068917 is a deficient number, since it is larger than the sum of its proper divisors (1).

198068917 is an equidigital number, since it uses as much as digits as its factorization.

198068917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 198068917 is about 14073.6959253780. The cubic root of 198068917 is about 582.9152835664.

The spelling of 198068917 in words is "one hundred ninety-eight million, sixty-eight thousand, nine hundred seventeen".