91107229 has 2 divisors, whose sum is σ = 91107230. Its totient is φ = 91107228.

The previous prime is 91107193. The next prime is 91107251. The reversal of 91107229 is 92270119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59444100 + 31663129 = 7710^2 + 5627^2 .

It is a cyclic number.

It is not a de Polignac number, because 91107229 - 2¹⁵ = 91074461 is a prime.

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 91107229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91107259) 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, 45553614 + 45553615.

It is an arithmetic number, because the mean of its divisors is an integer number (45553615).

Almost surely, 2^91107229 is an apocalyptic number.

It is an amenable number.

91107229 is a deficient number, since it is larger than the sum of its proper divisors (1).

91107229 is an equidigital number, since it uses as much as digits as its factorization.

91107229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 91107229 is about 9545.0106862172. The cubic root of 91107229 is about 449.9707454233.

The spelling of 91107229 in words is "ninety-one million, one hundred seven thousand, two hundred twenty-nine".