9099910091 has 2 divisors, whose sum is σ = 9099910092. Its totient is φ = 9099910090.

The previous prime is 9099910063. The next prime is 9099910133. The reversal of 9099910091 is 1900199909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9099910091 - 2¹⁰ = 9099909067 is a prime.

It is not a weakly prime, because it can be changed into another prime (9099910031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4549955045 + 4549955046.

It is an arithmetic number, because the mean of its divisors is an integer number (4549955046).

Almost surely, 2^9099910091 is an apocalyptic number.

9099910091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9099910091 is an equidigital number, since it uses as much as digits as its factorization.

9099910091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 9099910091 is about 95393.4488893236. The cubic root of 9099910091 is about 2087.7526028764.

The spelling of 9099910091 in words is "nine billion, ninety-nine million, nine hundred ten thousand, ninety-one".