91480891 has 2 divisors, whose sum is σ = 91480892. Its totient is φ = 91480890.

The previous prime is 91480871. The next prime is 91480919. The reversal of 91480891 is 19808419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91480891 - 2²³ = 83092283 is a prime.

It is not a weakly prime, because it can be changed into another prime (91480841) 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, 45740445 + 45740446.

It is an arithmetic number, because the mean of its divisors is an integer number (45740446).

Almost surely, 2^91480891 is an apocalyptic number.

91480891 is a deficient number, since it is larger than the sum of its proper divisors (1).

91480891 is an equidigital number, since it uses as much as digits as its factorization.

91480891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 91480891 is about 9564.5643392682. The cubic root of 91480891 is about 450.5850678006.

The spelling of 91480891 in words is "ninety-one million, four hundred eighty thousand, eight hundred ninety-one".