198917753 has 2 divisors, whose sum is σ = 198917754. Its totient is φ = 198917752.

The previous prime is 198917723. The next prime is 198917779. The reversal of 198917753 is 357719891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193404649 + 5513104 = 13907^2 + 2348^2 .

It is a cyclic number.

It is not a de Polignac number, because 198917753 - 2¹⁴ = 198901369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198917723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99458876 + 99458877.

It is an arithmetic number, because the mean of its divisors is an integer number (99458877).

Almost surely, 2^198917753 is an apocalyptic number.

It is an amenable number.

198917753 is a deficient number, since it is larger than the sum of its proper divisors (1).

198917753 is an equidigital number, since it uses as much as digits as its factorization.

198917753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 50.

The square root of 198917753 is about 14103.8205107694. The cubic root of 198917753 is about 583.7468027710.

The spelling of 198917753 in words is "one hundred ninety-eight million, nine hundred seventeen thousand, seven hundred fifty-three".