191304740572789 has 2 divisors, whose sum is σ = 191304740572790. Its totient is φ = 191304740572788.

The previous prime is 191304740572703. The next prime is 191304740572817. The reversal of 191304740572789 is 987275047403191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170109858208689 + 21194882364100 = 13042617^2 + 4603790^2 .

It is a cyclic number.

It is not a de Polignac number, because 191304740572789 - 2⁹ = 191304740572277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191304740578789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95652370286394 + 95652370286395.

It is an arithmetic number, because the mean of its divisors is an integer number (95652370286395).

Almost surely, 2^{191304740572789} is an apocalyptic number.

It is an amenable number.

191304740572789 is a deficient number, since it is larger than the sum of its proper divisors (1).

191304740572789 is an equidigital number, since it uses as much as digits as its factorization.

191304740572789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 106686720, while the sum is 67.

The spelling of 191304740572789 in words is "one hundred ninety-one trillion, three hundred four billion, seven hundred forty million, five hundred seventy-two thousand, seven hundred eighty-nine".