91610908860973 has 2 divisors, whose sum is σ = 91610908860974. Its totient is φ = 91610908860972.

The previous prime is 91610908860971. The next prime is 91610908860979. The reversal of 91610908860973 is 37906880901619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48447349130569 + 43163559730404 = 6960413^2 + 6569898^2 .

It is an emirp because it is prime and its reverse (37906880901619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91610908860973 - 2¹ = 91610908860971 is a prime.

Together with 91610908860971, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 91610908860899 and 91610908860908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91610908860971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45805454430486 + 45805454430487.

It is an arithmetic number, because the mean of its divisors is an integer number (45805454430487).

Almost surely, 2^{91610908860973} is an apocalyptic number.

It is an amenable number.

91610908860973 is a deficient number, since it is larger than the sum of its proper divisors (1).

91610908860973 is an equidigital number, since it uses as much as digits as its factorization.

91610908860973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 91610908860973 in words is "ninety-one trillion, six hundred ten billion, nine hundred eight million, eight hundred sixty thousand, nine hundred seventy-three".