191246042747 has 2 divisors, whose sum is σ = 191246042748. Its totient is φ = 191246042746.

The previous prime is 191246042719. The next prime is 191246042761. The reversal of 191246042747 is 747240642191.

191246042747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (747240642191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191246042747 - 2¹² = 191246038651 is a prime.

It is not a weakly prime, because it can be changed into another prime (191246042717) 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, 95623021373 + 95623021374.

It is an arithmetic number, because the mean of its divisors is an integer number (95623021374).

Almost surely, 2^191246042747 is an apocalyptic number.

191246042747 is a deficient number, since it is larger than the sum of its proper divisors (1).

191246042747 is an equidigital number, since it uses as much as digits as its factorization.

191246042747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 191246042747 in words is "one hundred ninety-one billion, two hundred forty-six million, forty-two thousand, seven hundred forty-seven".