91895417 has 2 divisors, whose sum is σ = 91895418. Its totient is φ = 91895416.

The previous prime is 91895339. The next prime is 91895423. The reversal of 91895417 is 71459819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91795561 + 99856 = 9581^2 + 316^2 .

It is an emirp because it is prime and its reverse (71459819) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91895417 is a prime.

It is not a weakly prime, because it can be changed into another prime (91895497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45947708 + 45947709.

It is an arithmetic number, because the mean of its divisors is an integer number (45947709).

Almost surely, 2^91895417 is an apocalyptic number.

It is an amenable number.

91895417 is a deficient number, since it is larger than the sum of its proper divisors (1).

91895417 is an equidigital number, since it uses as much as digits as its factorization.

91895417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 44.

The square root of 91895417 is about 9586.2097306495. The cubic root of 91895417 is about 451.2646188894.

The spelling of 91895417 in words is "ninety-one million, eight hundred ninety-five thousand, four hundred seventeen".