91965317 has 2 divisors, whose sum is σ = 91965318. Its totient is φ = 91965316.

The previous prime is 91965299. The next prime is 91965329. The reversal of 91965317 is 71356919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73034116 + 18931201 = 8546^2 + 4351^2 .

It is an emirp because it is prime and its reverse (71356919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91965317 - 2¹⁶ = 91899781 is a prime.

It is a super-3 number, since 3×91965317³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91965817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45982658 + 45982659.

It is an arithmetic number, because the mean of its divisors is an integer number (45982659).

Almost surely, 2^91965317 is an apocalyptic number.

It is an amenable number.

91965317 is a deficient number, since it is larger than the sum of its proper divisors (1).

91965317 is an equidigital number, since it uses as much as digits as its factorization.

91965317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 41.

The square root of 91965317 is about 9589.8548998408. The cubic root of 91965317 is about 451.3790076277.

The spelling of 91965317 in words is "ninety-one million, nine hundred sixty-five thousand, three hundred seventeen".