198053960789 has 2 divisors, whose sum is σ = 198053960790. Its totient is φ = 198053960788.

The previous prime is 198053960723. The next prime is 198053960801. The reversal of 198053960789 is 987069350891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154435638289 + 43618322500 = 392983^2 + 208850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198053960789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198053960989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99026980394 + 99026980395.

It is an arithmetic number, because the mean of its divisors is an integer number (99026980395).

Almost surely, 2^198053960789 is an apocalyptic number.

It is an amenable number.

198053960789 is a deficient number, since it is larger than the sum of its proper divisors (1).

198053960789 is an equidigital number, since it uses as much as digits as its factorization.

198053960789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 198053960789 in words is "one hundred ninety-eight billion, fifty-three million, nine hundred sixty thousand, seven hundred eighty-nine".