199963783078729 has 2 divisors, whose sum is σ = 199963783078730. Its totient is φ = 199963783078728.

The previous prime is 199963783078693. The next prime is 199963783078819. The reversal of 199963783078729 is 927870387369991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198205626416704 + 1758156662025 = 14078552^2 + 1325955^2 .

It is a cyclic number.

It is not a de Polignac number, because 199963783078729 - 2⁹ = 199963783078217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199963783078729.

It is not a weakly prime, because it can be changed into another prime (199963783078429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99981891539364 + 99981891539365.

It is an arithmetic number, because the mean of its divisors is an integer number (99981891539365).

Almost surely, 2^{199963783078729} is an apocalyptic number.

It is an amenable number.

199963783078729 is a deficient number, since it is larger than the sum of its proper divisors (1).

199963783078729 is an equidigital number, since it uses as much as digits as its factorization.

199963783078729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15554923776, while the sum is 88.

The spelling of 199963783078729 in words is "one hundred ninety-nine trillion, nine hundred sixty-three billion, seven hundred eighty-three million, seventy-eight thousand, seven hundred twenty-nine".