91049207 has 2 divisors, whose sum is σ = 91049208. Its totient is φ = 91049206.

The previous prime is 91049191. The next prime is 91049239. The reversal of 91049207 is 70294019.

It is an a-pointer prime, because the next prime (91049239) can be obtained adding 91049207 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91049207 - 2⁴ = 91049191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91049107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45524603 + 45524604.

It is an arithmetic number, because the mean of its divisors is an integer number (45524604).

Almost surely, 2^91049207 is an apocalyptic number.

91049207 is a deficient number, since it is larger than the sum of its proper divisors (1).

91049207 is an equidigital number, since it uses as much as digits as its factorization.

91049207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 91049207 is about 9541.9708132021. The cubic root of 91049207 is about 449.8752032539.

The spelling of 91049207 in words is "ninety-one million, forty-nine thousand, two hundred seven".