91450440223 has 2 divisors, whose sum is σ = 91450440224. Its totient is φ = 91450440222.

The previous prime is 91450440173. The next prime is 91450440227. The reversal of 91450440223 is 32204405419.

It is a strong prime.

It is an emirp because it is prime and its reverse (32204405419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91450440223 - 2⁹ = 91450439711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91450440227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45725220111 + 45725220112.

It is an arithmetic number, because the mean of its divisors is an integer number (45725220112).

Almost surely, 2^91450440223 is an apocalyptic number.

91450440223 is a deficient number, since it is larger than the sum of its proper divisors (1).

91450440223 is an equidigital number, since it uses as much as digits as its factorization.

91450440223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 91450440223 in words is "ninety-one billion, four hundred fifty million, four hundred forty thousand, two hundred twenty-three".