91910414593 has 2 divisors, whose sum is σ = 91910414594. Its totient is φ = 91910414592.

The previous prime is 91910414549. The next prime is 91910414641. The reversal of 91910414593 is 39541401919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89620600689 + 2289813904 = 299367^2 + 47852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91910414593 is a prime.

It is not a weakly prime, because it can be changed into another prime (91980414593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45955207296 + 45955207297.

It is an arithmetic number, because the mean of its divisors is an integer number (45955207297).

Almost surely, 2^91910414593 is an apocalyptic number.

It is an amenable number.

91910414593 is a deficient number, since it is larger than the sum of its proper divisors (1).

91910414593 is an equidigital number, since it uses as much as digits as its factorization.

91910414593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 91910414593 in words is "ninety-one billion, nine hundred ten million, four hundred fourteen thousand, five hundred ninety-three".