9681305213 has 2 divisors, whose sum is σ = 9681305214. Its totient is φ = 9681305212.

The previous prime is 9681305209. The next prime is 9681305233. The reversal of 9681305213 is 3125031869.

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., 7266369049 + 2414936164 = 85243^2 + 49142^2 .

It is an emirp because it is prime and its reverse (3125031869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9681305213 - 2² = 9681305209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9681305203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840652606 + 4840652607.

It is an arithmetic number, because the mean of its divisors is an integer number (4840652607).

Almost surely, 2^9681305213 is an apocalyptic number.

It is an amenable number.

9681305213 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681305213 is an equidigital number, since it uses as much as digits as its factorization.

9681305213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 9681305213 is about 98393.6238432146. The cubic root of 9681305213 is about 2131.3002569620.

The spelling of 9681305213 in words is "nine billion, six hundred eighty-one million, three hundred five thousand, two hundred thirteen".