199969146193 has 2 divisors, whose sum is σ = 199969146194. Its totient is φ = 199969146192.

The previous prime is 199969146161. The next prime is 199969146239. The reversal of 199969146193 is 391641969991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112149972544 + 87819173649 = 334888^2 + 296343^2 .

It is a cyclic number.

It is not a de Polignac number, because 199969146193 - 2⁵ = 199969146161 is a prime.

It is not a weakly prime, because it can be changed into another prime (199969146593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99984573096 + 99984573097.

It is an arithmetic number, because the mean of its divisors is an integer number (99984573097).

Almost surely, 2^199969146193 is an apocalyptic number.

It is an amenable number.

199969146193 is a deficient number, since it is larger than the sum of its proper divisors (1).

199969146193 is an equidigital number, since it uses as much as digits as its factorization.

199969146193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25509168, while the sum is 67.

The spelling of 199969146193 in words is "one hundred ninety-nine billion, nine hundred sixty-nine million, one hundred forty-six thousand, one hundred ninety-three".