8198459197 has 2 divisors, whose sum is σ = 8198459198. Its totient is φ = 8198459196.

The previous prime is 8198459189. The next prime is 8198459201. The reversal of 8198459197 is 7919548918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4292084196 + 3906375001 = 65514^2 + 62501^2 .

It is a cyclic number.

It is not a de Polignac number, because 8198459197 - 2³ = 8198459189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8198459167) 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, 4099229598 + 4099229599.

It is an arithmetic number, because the mean of its divisors is an integer number (4099229599).

Almost surely, 2^8198459197 is an apocalyptic number.

It is an amenable number.

8198459197 is a deficient number, since it is larger than the sum of its proper divisors (1).

8198459197 is an equidigital number, since it uses as much as digits as its factorization.

8198459197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 61.

The square root of 8198459197 is about 90545.3433203497. The cubic root of 8198459197 is about 2016.4033634456.

The spelling of 8198459197 in words is "eight billion, one hundred ninety-eight million, four hundred fifty-nine thousand, one hundred ninety-seven".