199886903729 has 2 divisors, whose sum is σ = 199886903730. Its totient is φ = 199886903728.

The previous prime is 199886903717. The next prime is 199886903761. The reversal of 199886903729 is 927309688991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130991153329 + 68895750400 = 361927^2 + 262480^2 .

It is a cyclic number.

It is not a de Polignac number, because 199886903729 - 2²⁰ = 199885855153 is a prime.

It is not a weakly prime, because it can be changed into another prime (199886903779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99943451864 + 99943451865.

It is an arithmetic number, because the mean of its divisors is an integer number (99943451865).

Almost surely, 2^199886903729 is an apocalyptic number.

It is an amenable number.

199886903729 is a deficient number, since it is larger than the sum of its proper divisors (1).

199886903729 is an equidigital number, since it uses as much as digits as its factorization.

199886903729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105815808, while the sum is 71.

The spelling of 199886903729 in words is "one hundred ninety-nine billion, eight hundred eighty-six million, nine hundred three thousand, seven hundred twenty-nine".