91126249 has 2 divisors, whose sum is σ = 91126250. Its totient is φ = 91126248.

The previous prime is 91126247. The next prime is 91126297. The reversal of 91126249 is 94262119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81090025 + 10036224 = 9005^2 + 3168^2 .

It is a cyclic number.

It is not a de Polignac number, because 91126249 - 2¹ = 91126247 is a prime.

Together with 91126247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91126241) 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, 45563124 + 45563125.

It is an arithmetic number, because the mean of its divisors is an integer number (45563125).

Almost surely, 2^91126249 is an apocalyptic number.

It is an amenable number.

91126249 is a deficient number, since it is larger than the sum of its proper divisors (1).

91126249 is an equidigital number, since it uses as much as digits as its factorization.

91126249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 91126249 is about 9546.0069662661. The cubic root of 91126249 is about 450.0020559577.

The spelling of 91126249 in words is "ninety-one million, one hundred twenty-six thousand, two hundred forty-nine".