9687281 has 2 divisors, whose sum is σ = 9687282. Its totient is φ = 9687280.

The previous prime is 9687257. The next prime is 9687299. The reversal of 9687281 is 1827869.

9687281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 3010225 = 2584^2 + 1735^2 .

It is an emirp because it is prime and its reverse (1827869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9687281 - 2¹⁸ = 9425137 is a prime.

It is a super-2 number, since 2×9687281² = 187686826345922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9687211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4843640 + 4843641.

It is an arithmetic number, because the mean of its divisors is an integer number (4843641).

Almost surely, 2^9687281 is an apocalyptic number.

It is an amenable number.

9687281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9687281 is an equidigital number, since it uses as much as digits as its factorization.

9687281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 9687281 is about 3112.4397182917. The cubic root of 9687281 is about 213.1738681896.

The spelling of 9687281 in words is "nine million, six hundred eighty-seven thousand, two hundred eighty-one".