9689731 has 2 divisors, whose sum is σ = 9689732. Its totient is φ = 9689730.

The previous prime is 9689717. The next prime is 9689767. The reversal of 9689731 is 1379869.

9689731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1379869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9689731 - 2²¹ = 7592579 is a prime.

It is a super-2 number, since 2×9689731² = 187781773704722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9689131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844865 + 4844866.

It is an arithmetic number, because the mean of its divisors is an integer number (4844866).

Almost surely, 2^9689731 is an apocalyptic number.

9689731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689731 is an equidigital number, since it uses as much as digits as its factorization.

9689731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 9689731 is about 3112.8332753297. The cubic root of 9689731 is about 213.1918378673.

The spelling of 9689731 in words is "nine million, six hundred eighty-nine thousand, seven hundred thirty-one".