191031094049 has 2 divisors, whose sum is σ = 191031094050. Its totient is φ = 191031094048.

The previous prime is 191031094031. The next prime is 191031094087. The reversal of 191031094049 is 940490130191.

191031094049 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., 105775853824 + 85255240225 = 325232^2 + 291985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191031094049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191031093997 and 191031094015.

It is not a weakly prime, because it can be changed into another prime (191031094099) 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, 95515547024 + 95515547025.

It is an arithmetic number, because the mean of its divisors is an integer number (95515547025).

Almost surely, 2^191031094049 is an apocalyptic number.

It is an amenable number.

191031094049 is a deficient number, since it is larger than the sum of its proper divisors (1).

191031094049 is an equidigital number, since it uses as much as digits as its factorization.

191031094049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The spelling of 191031094049 in words is "one hundred ninety-one billion, thirty-one million, ninety-four thousand, forty-nine".