91895317 has 2 divisors, whose sum is σ = 91895318. Its totient is φ = 91895316.

The previous prime is 91895299. The next prime is 91895333. The reversal of 91895317 is 71359819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62583921 + 29311396 = 7911^2 + 5414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91895317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91895017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45947658 + 45947659.

It is an arithmetic number, because the mean of its divisors is an integer number (45947659).

Almost surely, 2^91895317 is an apocalyptic number.

It is an amenable number.

91895317 is a deficient number, since it is larger than the sum of its proper divisors (1).

91895317 is an equidigital number, since it uses as much as digits as its factorization.

91895317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The square root of 91895317 is about 9586.2045148223. The cubic root of 91895317 is about 451.2644552015.

The spelling of 91895317 in words is "ninety-one million, eight hundred ninety-five thousand, three hundred seventeen".