199893044839 has 2 divisors, whose sum is σ = 199893044840. Its totient is φ = 199893044838.

The previous prime is 199893044833. The next prime is 199893044861. The reversal of 199893044839 is 938440398991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199893044839 - 2⁵ = 199893044807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199893044833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99946522419 + 99946522420.

It is an arithmetic number, because the mean of its divisors is an integer number (99946522420).

Almost surely, 2^199893044839 is an apocalyptic number.

199893044839 is a deficient number, since it is larger than the sum of its proper divisors (1).

199893044839 is an equidigital number, since it uses as much as digits as its factorization.

199893044839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60466176, while the sum is 67.

The spelling of 199893044839 in words is "one hundred ninety-nine billion, eight hundred ninety-three million, forty-four thousand, eight hundred thirty-nine".