198208453123 has 2 divisors, whose sum is σ = 198208453124. Its totient is φ = 198208453122.

The previous prime is 198208453111. The next prime is 198208453127. The reversal of 198208453123 is 321354802891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198208453123 is a prime.

It is not a weakly prime, because it can be changed into another prime (198208453127) 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, 99104226561 + 99104226562.

It is an arithmetic number, because the mean of its divisors is an integer number (99104226562).

Almost surely, 2^198208453123 is an apocalyptic number.

198208453123 is a deficient number, since it is larger than the sum of its proper divisors (1).

198208453123 is an equidigital number, since it uses as much as digits as its factorization.

198208453123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 198208453123 in words is "one hundred ninety-eight billion, two hundred eight million, four hundred fifty-three thousand, one hundred twenty-three".