91380017 has 2 divisors, whose sum is σ = 91380018. Its totient is φ = 91380016.

The previous prime is 91380001. The next prime is 91380019. The reversal of 91380017 is 71008319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50112241 + 41267776 = 7079^2 + 6424^2 .

It is an emirp because it is prime and its reverse (71008319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91380017 - 2⁴ = 91380001 is a prime.

Together with 91380019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91380019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45690008 + 45690009.

It is an arithmetic number, because the mean of its divisors is an integer number (45690009).

Almost surely, 2^91380017 is an apocalyptic number.

It is an amenable number.

91380017 is a deficient number, since it is larger than the sum of its proper divisors (1).

91380017 is an equidigital number, since it uses as much as digits as its factorization.

91380017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 91380017 is about 9559.2895656529. The cubic root of 91380017 is about 450.4193900862.

The spelling of 91380017 in words is "ninety-one million, three hundred eighty thousand, seventeen".