91939324853 has 2 divisors, whose sum is σ = 91939324854. Its totient is φ = 91939324852.

The previous prime is 91939324831. The next prime is 91939324891. The reversal of 91939324853 is 35842393919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82255387204 + 9683937649 = 286802^2 + 98407^2 .

It is a cyclic number.

It is not a de Polignac number, because 91939324853 - 2¹⁰ = 91939323829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91939324823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45969662426 + 45969662427.

It is an arithmetic number, because the mean of its divisors is an integer number (45969662427).

Almost surely, 2^91939324853 is an apocalyptic number.

It is an amenable number.

91939324853 is a deficient number, since it is larger than the sum of its proper divisors (1).

91939324853 is an equidigital number, since it uses as much as digits as its factorization.

91939324853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6298560, while the sum is 56.

The spelling of 91939324853 in words is "ninety-one billion, nine hundred thirty-nine million, three hundred twenty-four thousand, eight hundred fifty-three".