91580791 has 2 divisors, whose sum is σ = 91580792. Its totient is φ = 91580790.

The previous prime is 91580777. The next prime is 91580833. The reversal of 91580791 is 19708519.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91580791 - 2⁷ = 91580663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91580701) 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, 45790395 + 45790396.

It is an arithmetic number, because the mean of its divisors is an integer number (45790396).

Almost surely, 2^91580791 is an apocalyptic number.

91580791 is a deficient number, since it is larger than the sum of its proper divisors (1).

91580791 is an equidigital number, since it uses as much as digits as its factorization.

91580791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 91580791 is about 9569.7853162963. The cubic root of 91580791 is about 450.7490258045.

The spelling of 91580791 in words is "ninety-one million, five hundred eighty thousand, seven hundred ninety-one".