91090008899 has 2 divisors, whose sum is σ = 91090008900. Its totient is φ = 91090008898.

The previous prime is 91090008827. The next prime is 91090008901. The reversal of 91090008899 is 99880009019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91090008899 - 2¹⁶ = 91089943363 is a prime.

Together with 91090008901, it forms a pair of twin primes.

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 91090008899.

It is not a weakly prime, because it can be changed into another prime (91090008799) 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, 45545004449 + 45545004450.

It is an arithmetic number, because the mean of its divisors is an integer number (45545004450).

Almost surely, 2^91090008899 is an apocalyptic number.

91090008899 is a deficient number, since it is larger than the sum of its proper divisors (1).

91090008899 is an equidigital number, since it uses as much as digits as its factorization.

91090008899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 53.

The spelling of 91090008899 in words is "ninety-one billion, ninety million, eight thousand, eight hundred ninety-nine".