198043022417 has 2 divisors, whose sum is σ = 198043022418. Its totient is φ = 198043022416.

The previous prime is 198043022399. The next prime is 198043022479. The reversal of 198043022417 is 714220340891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157145645056 + 40897377361 = 396416^2 + 202231^2 .

It is a cyclic number.

It is not a de Polignac number, because 198043022417 - 2¹⁸ = 198042760273 is a prime.

It is not a weakly prime, because it can be changed into another prime (198043022017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99021511208 + 99021511209.

It is an arithmetic number, because the mean of its divisors is an integer number (99021511209).

Almost surely, 2^198043022417 is an apocalyptic number.

It is an amenable number.

198043022417 is a deficient number, since it is larger than the sum of its proper divisors (1).

198043022417 is an equidigital number, since it uses as much as digits as its factorization.

198043022417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 198043022417 in words is "one hundred ninety-eight billion, forty-three million, twenty-two thousand, four hundred seventeen".