91340298537493 has 2 divisors, whose sum is σ = 91340298537494. Its totient is φ = 91340298537492.

The previous prime is 91340298537487. The next prime is 91340298537533. The reversal of 91340298537493 is 39473589204319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63596828956644 + 27743469580849 = 7974762^2 + 5267207^2 .

It is an emirp because it is prime and its reverse (39473589204319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91340298537493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91340296537493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45670149268746 + 45670149268747.

It is an arithmetic number, because the mean of its divisors is an integer number (45670149268747).

Almost surely, 2^{91340298537493} is an apocalyptic number.

It is an amenable number.

91340298537493 is a deficient number, since it is larger than the sum of its proper divisors (1).

91340298537493 is an equidigital number, since it uses as much as digits as its factorization.

91340298537493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176359680, while the sum is 67.

The spelling of 91340298537493 in words is "ninety-one trillion, three hundred forty billion, two hundred ninety-eight million, five hundred thirty-seven thousand, four hundred ninety-three".