198742998101 has 2 divisors, whose sum is σ = 198742998102. Its totient is φ = 198742998100.

The previous prime is 198742998089. The next prime is 198742998169. The reversal of 198742998101 is 101899247891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181020466225 + 17722531876 = 425465^2 + 133126^2 .

It is a cyclic number.

It is not a de Polignac number, because 198742998101 - 2¹⁸ = 198742735957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198742998191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99371499050 + 99371499051.

It is an arithmetic number, because the mean of its divisors is an integer number (99371499051).

Almost surely, 2^198742998101 is an apocalyptic number.

It is an amenable number.

198742998101 is a deficient number, since it is larger than the sum of its proper divisors (1).

198742998101 is an equidigital number, since it uses as much as digits as its factorization.

198742998101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 59.

The spelling of 198742998101 in words is "one hundred ninety-eight billion, seven hundred forty-two million, nine hundred ninety-eight thousand, one hundred one".