91235565727 has 2 divisors, whose sum is σ = 91235565728. Its totient is φ = 91235565726.

The previous prime is 91235565683. The next prime is 91235565761. The reversal of 91235565727 is 72756553219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91235565727 - 2⁷ = 91235565599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91235515727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45617782863 + 45617782864.

It is an arithmetic number, because the mean of its divisors is an integer number (45617782864).

Almost surely, 2^91235565727 is an apocalyptic number.

91235565727 is a deficient number, since it is larger than the sum of its proper divisors (1).

91235565727 is an equidigital number, since it uses as much as digits as its factorization.

91235565727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969000, while the sum is 52.

The spelling of 91235565727 in words is "ninety-one billion, two hundred thirty-five million, five hundred sixty-five thousand, seven hundred twenty-seven".