198236989417 has 2 divisors, whose sum is σ = 198236989418. Its totient is φ = 198236989416.

The previous prime is 198236989403. The next prime is 198236989451. The reversal of 198236989417 is 714989632891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169069814761 + 29167174656 = 411181^2 + 170784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198236989417 is a prime.

It is not a weakly prime, because it can be changed into another prime (198236089417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99118494708 + 99118494709.

It is an arithmetic number, because the mean of its divisors is an integer number (99118494709).

Almost surely, 2^198236989417 is an apocalyptic number.

It is an amenable number.

198236989417 is a deficient number, since it is larger than the sum of its proper divisors (1).

198236989417 is an equidigital number, since it uses as much as digits as its factorization.

198236989417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 67.

The spelling of 198236989417 in words is "one hundred ninety-eight billion, two hundred thirty-six million, nine hundred eighty-nine thousand, four hundred seventeen".