91765417 has 2 divisors, whose sum is σ = 91765418. Its totient is φ = 91765416.

The previous prime is 91765361. The next prime is 91765433. The reversal of 91765417 is 71456719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90706576 + 1058841 = 9524^2 + 1029^2 .

It is an emirp because it is prime and its reverse (71456719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91765417 - 2¹⁵ = 91732649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91765417.

It is not a weakly prime, because it can be changed into another prime (91765717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45882708 + 45882709.

It is an arithmetic number, because the mean of its divisors is an integer number (45882709).

Almost surely, 2^91765417 is an apocalyptic number.

It is an amenable number.

91765417 is a deficient number, since it is larger than the sum of its proper divisors (1).

91765417 is an equidigital number, since it uses as much as digits as its factorization.

91765417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 91765417 is about 9579.4267573796. The cubic root of 91765417 is about 451.0517243934.

The spelling of 91765417 in words is "ninety-one million, seven hundred sixty-five thousand, four hundred seventeen".