91109299 has 2 divisors, whose sum is σ = 91109300. Its totient is φ = 91109298.

The previous prime is 91109267. The next prime is 91109309. The reversal of 91109299 is 99290119.

It is a strong prime.

It is an emirp because it is prime and its reverse (99290119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91109299 - 2⁵ = 91109267 is a prime.

It is not a weakly prime, because it can be changed into another prime (91109209) 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, 45554649 + 45554650.

It is an arithmetic number, because the mean of its divisors is an integer number (45554650).

Almost surely, 2^91109299 is an apocalyptic number.

91109299 is a deficient number, since it is larger than the sum of its proper divisors (1).

91109299 is an equidigital number, since it uses as much as digits as its factorization.

91109299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 91109299 is about 9545.1191192148. The cubic root of 91109299 is about 449.9741532480.

The spelling of 91109299 in words is "ninety-one million, one hundred nine thousand, two hundred ninety-nine".