9681361 has 2 divisors, whose sum is σ = 9681362. Its totient is φ = 9681360.

The previous prime is 9681359. The next prime is 9681401. The reversal of 9681361 is 1631869.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9339136 + 342225 = 3056^2 + 585^2 .

It is an emirp because it is prime and its reverse (1631869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9681361 - 2¹ = 9681359 is a prime.

Together with 9681359, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9681311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840680 + 4840681.

It is an arithmetic number, because the mean of its divisors is an integer number (4840681).

Almost surely, 2^9681361 is an apocalyptic number.

9681361 is the 1392-nd centered decagonal number.

It is an amenable number.

9681361 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681361 is an equidigital number, since it uses as much as digits as its factorization.

9681361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 9681361 is about 3111.4885505173. The cubic root of 9681361 is about 213.1304350715.

The spelling of 9681361 in words is "nine million, six hundred eighty-one thousand, three hundred sixty-one".