91395980063 has 2 divisors, whose sum is σ = 91395980064. Its totient is φ = 91395980062.

The previous prime is 91395979973. The next prime is 91395980111. The reversal of 91395980063 is 36008959319.

It is a strong prime.

It is an emirp because it is prime and its reverse (36008959319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91395980063 - 2¹⁰ = 91395979039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91395979987 and 91395980014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91395980563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45697990031 + 45697990032.

It is an arithmetic number, because the mean of its divisors is an integer number (45697990032).

Almost surely, 2^91395980063 is an apocalyptic number.

91395980063 is a deficient number, since it is larger than the sum of its proper divisors (1).

91395980063 is an equidigital number, since it uses as much as digits as its factorization.

91395980063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 91395980063 in words is "ninety-one billion, three hundred ninety-five million, nine hundred eighty thousand, sixty-three".