199019744813 has 2 divisors, whose sum is σ = 199019744814. Its totient is φ = 199019744812.

The previous prime is 199019744789. The next prime is 199019744849. The reversal of 199019744813 is 318447910991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153352909609 + 45666835204 = 391603^2 + 213698^2 .

It is a cyclic number.

It is not a de Polignac number, because 199019744813 - 2⁸ = 199019744557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199019744893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99509872406 + 99509872407.

It is an arithmetic number, because the mean of its divisors is an integer number (99509872407).

Almost surely, 2^199019744813 is an apocalyptic number.

It is an amenable number.

199019744813 is a deficient number, since it is larger than the sum of its proper divisors (1).

199019744813 is an equidigital number, since it uses as much as digits as its factorization.

199019744813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 199019744813 in words is "one hundred ninety-nine billion, nineteen million, seven hundred forty-four thousand, eight hundred thirteen".