91530672773 has 2 divisors, whose sum is σ = 91530672774. Its totient is φ = 91530672772.

The previous prime is 91530672763. The next prime is 91530672797. The reversal of 91530672773 is 37727603519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89022866689 + 2507806084 = 298367^2 + 50078^2 .

It is an emirp because it is prime and its reverse (37727603519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91530672773 is a prime.

It is a super-3 number, since 3×91530672773³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91530672763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45765336386 + 45765336387.

It is an arithmetic number, because the mean of its divisors is an integer number (45765336387).

Almost surely, 2^91530672773 is an apocalyptic number.

It is an amenable number.

91530672773 is a deficient number, since it is larger than the sum of its proper divisors (1).

91530672773 is an equidigital number, since it uses as much as digits as its factorization.

91530672773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1666980, while the sum is 50.

The spelling of 91530672773 in words is "ninety-one billion, five hundred thirty million, six hundred seventy-two thousand, seven hundred seventy-three".