91259827 has 2 divisors, whose sum is σ = 91259828. Its totient is φ = 91259826.

The previous prime is 91259801. The next prime is 91259873. The reversal of 91259827 is 72895219.

It is a weak prime.

It is an emirp because it is prime and its reverse (72895219) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91259827 is a prime.

It is not a weakly prime, because it can be changed into another prime (91259887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45629913 + 45629914.

It is an arithmetic number, because the mean of its divisors is an integer number (45629914).

Almost surely, 2^91259827 is an apocalyptic number.

91259827 is a deficient number, since it is larger than the sum of its proper divisors (1).

91259827 is an equidigital number, since it uses as much as digits as its factorization.

91259827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 43.

The square root of 91259827 is about 9553.0009421124. Note that the first 3 decimals coincide. The cubic root of 91259827 is about 450.2218280802.

The spelling of 91259827 in words is "ninety-one million, two hundred fifty-nine thousand, eight hundred twenty-seven".