91312598317 has 2 divisors, whose sum is σ = 91312598318. Its totient is φ = 91312598316.

The previous prime is 91312598203. The next prime is 91312598329. The reversal of 91312598317 is 71389521319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55617675556 + 35694922761 = 235834^2 + 188931^2 .

It is a cyclic number.

It is not a de Polignac number, because 91312598317 - 2⁷ = 91312598189 is a prime.

It is a super-2 number, since 2×91312598317² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91312598417) 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, 45656299158 + 45656299159.

It is an arithmetic number, because the mean of its divisors is an integer number (45656299159).

Almost surely, 2^91312598317 is an apocalyptic number.

It is an amenable number.

91312598317 is a deficient number, since it is larger than the sum of its proper divisors (1).

91312598317 is an equidigital number, since it uses as much as digits as its factorization.

91312598317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 49.

The spelling of 91312598317 in words is "ninety-one billion, three hundred twelve million, five hundred ninety-eight thousand, three hundred seventeen".