91435944427 has 2 divisors, whose sum is σ = 91435944428. Its totient is φ = 91435944426.

The previous prime is 91435944407. The next prime is 91435944433. The reversal of 91435944427 is 72444953419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91435944427 - 2¹¹ = 91435942379 is a prime.

It is not a weakly prime, because it can be changed into another prime (91435944407) 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, 45717972213 + 45717972214.

It is an arithmetic number, because the mean of its divisors is an integer number (45717972214).

Almost surely, 2^91435944427 is an apocalyptic number.

91435944427 is a deficient number, since it is larger than the sum of its proper divisors (1).

91435944427 is an equidigital number, since it uses as much as digits as its factorization.

91435944427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 52.

The spelling of 91435944427 in words is "ninety-one billion, four hundred thirty-five million, nine hundred forty-four thousand, four hundred twenty-seven".