189912354008939 has 2 divisors, whose sum is σ = 189912354008940. Its totient is φ = 189912354008938.

The previous prime is 189912354008921. The next prime is 189912354008947. The reversal of 189912354008939 is 939800453219981.

It is a strong prime.

It is an emirp because it is prime and its reverse (939800453219981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189912354008939 - 2³² = 189908059041643 is a prime.

It is not a weakly prime, because it can be changed into another prime (189912314008939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94956177004469 + 94956177004470.

It is an arithmetic number, because the mean of its divisors is an integer number (94956177004470).

Almost surely, 2^{189912354008939} is an apocalyptic number.

189912354008939 is a deficient number, since it is larger than the sum of its proper divisors (1).

189912354008939 is an equidigital number, since it uses as much as digits as its factorization.

189912354008939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151165440, while the sum is 71.

The spelling of 189912354008939 in words is "one hundred eighty-nine trillion, nine hundred twelve billion, three hundred fifty-four million, eight thousand, nine hundred thirty-nine".