91130047273 has 2 divisors, whose sum is σ = 91130047274. Its totient is φ = 91130047272.

The previous prime is 91130047271. The next prime is 91130047313. The reversal of 91130047273 is 37274003119.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53246485504 + 37883561769 = 230752^2 + 194637^2 .

It is an emirp because it is prime and its reverse (37274003119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91130047273 - 2¹ = 91130047271 is a prime.

Together with 91130047271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91130047271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45565023636 + 45565023637.

It is an arithmetic number, because the mean of its divisors is an integer number (45565023637).

Almost surely, 2^91130047273 is an apocalyptic number.

It is an amenable number.

91130047273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91130047273 is an equidigital number, since it uses as much as digits as its factorization.

91130047273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The spelling of 91130047273 in words is "ninety-one billion, one hundred thirty million, forty-seven thousand, two hundred seventy-three".