199749269634773 has 2 divisors, whose sum is σ = 199749269634774. Its totient is φ = 199749269634772.

The previous prime is 199749269634751. The next prime is 199749269634787. The reversal of 199749269634773 is 377436962947991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103926647691364 + 95822621943409 = 10194442^2 + 9788903^2 .

It is a cyclic number.

It is not a de Polignac number, because 199749269634773 - 2¹⁶ = 199749269569237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199749269634973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99874634817386 + 99874634817387.

It is an arithmetic number, because the mean of its divisors is an integer number (99874634817387).

Almost surely, 2^{199749269634773} is an apocalyptic number.

It is an amenable number.

199749269634773 is a deficient number, since it is larger than the sum of its proper divisors (1).

199749269634773 is an equidigital number, since it uses as much as digits as its factorization.

199749269634773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23332385664, while the sum is 86.

The spelling of 199749269634773 in words is "one hundred ninety-nine trillion, seven hundred forty-nine billion, two hundred sixty-nine million, six hundred thirty-four thousand, seven hundred seventy-three".