198798822139 has 2 divisors, whose sum is σ = 198798822140. Its totient is φ = 198798822138.

The previous prime is 198798822107. The next prime is 198798822151. The reversal of 198798822139 is 931228897891.

It is a strong prime.

It is an emirp because it is prime and its reverse (931228897891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198798822139 - 2⁵ = 198798822107 is a prime.

It is not a weakly prime, because it can be changed into another prime (198798822199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99399411069 + 99399411070.

It is an arithmetic number, because the mean of its divisors is an integer number (99399411070).

Almost surely, 2^198798822139 is an apocalyptic number.

198798822139 is a deficient number, since it is larger than the sum of its proper divisors (1).

198798822139 is an equidigital number, since it uses as much as digits as its factorization.

198798822139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 67.

The spelling of 198798822139 in words is "one hundred ninety-eight billion, seven hundred ninety-eight million, eight hundred twenty-two thousand, one hundred thirty-nine".