199498797153697 has 2 divisors, whose sum is σ = 199498797153698. Its totient is φ = 199498797153696.

The previous prime is 199498797153637. The next prime is 199498797153727. The reversal of 199498797153697 is 796351797894991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112650861191521 + 86847935962176 = 10613711^2 + 9319224^2 .

It is a cyclic number.

It is not a de Polignac number, because 199498797153697 - 2⁷ = 199498797153569 is a prime.

It is not a weakly prime, because it can be changed into another prime (199498797153637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99749398576848 + 99749398576849.

It is an arithmetic number, because the mean of its divisors is an integer number (99749398576849).

Almost surely, 2^{199498797153697} is an apocalyptic number.

It is an amenable number.

199498797153697 is a deficient number, since it is larger than the sum of its proper divisors (1).

199498797153697 is an equidigital number, since it uses as much as digits as its factorization.

199498797153697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58330964160, while the sum is 94.

The spelling of 199498797153697 in words is "one hundred ninety-nine trillion, four hundred ninety-eight billion, seven hundred ninety-seven million, one hundred fifty-three thousand, six hundred ninety-seven".