91909595443 has 2 divisors, whose sum is σ = 91909595444. Its totient is φ = 91909595442.

The previous prime is 91909595423. The next prime is 91909595471. The reversal of 91909595443 is 34459590919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91909595443 - 2⁵ = 91909595411 is a prime.

It is not a weakly prime, because it can be changed into another prime (91909595423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45954797721 + 45954797722.

It is an arithmetic number, because the mean of its divisors is an integer number (45954797722).

Almost surely, 2^91909595443 is an apocalyptic number.

91909595443 is a deficient number, since it is larger than the sum of its proper divisors (1).

91909595443 is an equidigital number, since it uses as much as digits as its factorization.

91909595443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7873200, while the sum is 58.

The spelling of 91909595443 in words is "ninety-one billion, nine hundred nine million, five hundred ninety-five thousand, four hundred forty-three".