91087417 has 2 divisors, whose sum is σ = 91087418. Its totient is φ = 91087416.

The previous prime is 91087369. The next prime is 91087421. The reversal of 91087417 is 71478019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83557881 + 7529536 = 9141^2 + 2744^2 .

It is a cyclic number.

It is not a de Polignac number, because 91087417 - 2²³ = 82698809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91007417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45543708 + 45543709.

It is an arithmetic number, because the mean of its divisors is an integer number (45543709).

Almost surely, 2^91087417 is an apocalyptic number.

It is an amenable number.

91087417 is a deficient number, since it is larger than the sum of its proper divisors (1).

91087417 is an equidigital number, since it uses as much as digits as its factorization.

91087417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 91087417 is about 9543.9728101038. The cubic root of 91087417 is about 449.9381264724.

The spelling of 91087417 in words is "ninety-one million, eighty-seven thousand, four hundred seventeen".