91294787 has 2 divisors, whose sum is σ = 91294788. Its totient is φ = 91294786.

The previous prime is 91294781. The next prime is 91294793. The reversal of 91294787 is 78749219.

It is a balanced prime because it is at equal distance from previous prime (91294781) and next prime (91294793).

It is a cyclic number.

It is not a de Polignac number, because 91294787 - 2⁸ = 91294531 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91294781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45647393 + 45647394.

It is an arithmetic number, because the mean of its divisors is an integer number (45647394).

Almost surely, 2^91294787 is an apocalyptic number.

91294787 is a deficient number, since it is larger than the sum of its proper divisors (1).

91294787 is an equidigital number, since it uses as much as digits as its factorization.

91294787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 91294787 is about 9554.8305584139. The cubic root of 91294787 is about 450.2793113715.

The spelling of 91294787 in words is "ninety-one million, two hundred ninety-four thousand, seven hundred eighty-seven".