91284349691 has 2 divisors, whose sum is σ = 91284349692. Its totient is φ = 91284349690.

The previous prime is 91284349657. The next prime is 91284349699. The reversal of 91284349691 is 19694348219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91284349691 - 2¹⁰ = 91284348667 is a prime.

It is not a weakly prime, because it can be changed into another prime (91284349699) 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, 45642174845 + 45642174846.

It is an arithmetic number, because the mean of its divisors is an integer number (45642174846).

Almost surely, 2^91284349691 is an apocalyptic number.

91284349691 is a deficient number, since it is larger than the sum of its proper divisors (1).

91284349691 is an equidigital number, since it uses as much as digits as its factorization.

91284349691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 56.

The spelling of 91284349691 in words is "ninety-one billion, two hundred eighty-four million, three hundred forty-nine thousand, six hundred ninety-one".