191017632349 has 2 divisors, whose sum is σ = 191017632350. Its totient is φ = 191017632348.

The previous prime is 191017632329. The next prime is 191017632391. The reversal of 191017632349 is 943236710191.

191017632349 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., 183912322500 + 7105309849 = 428850^2 + 84293^2 .

It is an emirp because it is prime and its reverse (943236710191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191017632349 - 2⁹ = 191017631837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191017632299 and 191017632308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191017632329) 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, 95508816174 + 95508816175.

It is an arithmetic number, because the mean of its divisors is an integer number (95508816175).

Almost surely, 2^191017632349 is an apocalyptic number.

It is an amenable number.

191017632349 is a deficient number, since it is larger than the sum of its proper divisors (1).

191017632349 is an equidigital number, since it uses as much as digits as its factorization.

191017632349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 191017632349 in words is "one hundred ninety-one billion, seventeen million, six hundred thirty-two thousand, three hundred forty-nine".