9312681691 has 2 divisors, whose sum is σ = 9312681692. Its totient is φ = 9312681690.

The previous prime is 9312681689. The next prime is 9312681731. The reversal of 9312681691 is 1961862139.

It is a weak prime.

It is an emirp because it is prime and its reverse (1961862139) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9312681691 - 2¹ = 9312681689 is a prime.

Together with 9312681689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9312681601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4656340845 + 4656340846.

It is an arithmetic number, because the mean of its divisors is an integer number (4656340846).

Almost surely, 2^9312681691 is an apocalyptic number.

9312681691 is a deficient number, since it is larger than the sum of its proper divisors (1).

9312681691 is an equidigital number, since it uses as much as digits as its factorization.

9312681691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 46.

The square root of 9312681691 is about 96502.2367150109. The cubic root of 9312681691 is about 2103.8991572282.

The spelling of 9312681691 in words is "nine billion, three hundred twelve million, six hundred eighty-one thousand, six hundred ninety-one".