91086907 has 2 divisors, whose sum is σ = 91086908. Its totient is φ = 91086906.

The previous prime is 91086899. The next prime is 91086937. The reversal of 91086907 is 70968019.

It is a weak prime.

It is an emirp because it is prime and its reverse (70968019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91086907 - 2³ = 91086899 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91086907.

It is not a weakly prime, because it can be changed into another prime (91086937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45543453 + 45543454.

It is an arithmetic number, because the mean of its divisors is an integer number (45543454).

Almost surely, 2^91086907 is an apocalyptic number.

91086907 is a deficient number, since it is larger than the sum of its proper divisors (1).

91086907 is an equidigital number, since it uses as much as digits as its factorization.

91086907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 91086907 is about 9543.9460916332. The cubic root of 91086907 is about 449.9372867338.

The spelling of 91086907 in words is "ninety-one million, eighty-six thousand, nine hundred seven".