199994842513 has 2 divisors, whose sum is σ = 199994842514. Its totient is φ = 199994842512.

The previous prime is 199994842499. The next prime is 199994842543. The reversal of 199994842513 is 315248499991.

199994842513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125010330624 + 74984511889 = 353568^2 + 273833^2 .

It is a cyclic number.

It is not a de Polignac number, because 199994842513 - 2⁹ = 199994842001 is a prime.

It is not a weakly prime, because it can be changed into another prime (199994842543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99997421256 + 99997421257.

It is an arithmetic number, because the mean of its divisors is an integer number (99997421257).

Almost surely, 2^199994842513 is an apocalyptic number.

It is an amenable number.

199994842513 is a deficient number, since it is larger than the sum of its proper divisors (1).

199994842513 is an equidigital number, since it uses as much as digits as its factorization.

199994842513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25194240, while the sum is 64.

The spelling of 199994842513 in words is "one hundred ninety-nine billion, nine hundred ninety-four million, eight hundred forty-two thousand, five hundred thirteen".