91130313217 has 2 divisors, whose sum is σ = 91130313218. Its totient is φ = 91130313216.

The previous prime is 91130313193. The next prime is 91130313289. The reversal of 91130313217 is 71231303119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79672965696 + 11457347521 = 282264^2 + 107039^2 .

It is a cyclic number.

It is not a de Polignac number, because 91130313217 - 2¹¹ = 91130311169 is a prime.

It is not a weakly prime, because it can be changed into another prime (91130310217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45565156608 + 45565156609.

It is an arithmetic number, because the mean of its divisors is an integer number (45565156609).

Almost surely, 2^91130313217 is an apocalyptic number.

It is an amenable number.

91130313217 is a deficient number, since it is larger than the sum of its proper divisors (1).

91130313217 is an equidigital number, since it uses as much as digits as its factorization.

91130313217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The spelling of 91130313217 in words is "ninety-one billion, one hundred thirty million, three hundred thirteen thousand, two hundred seventeen".