9689521 has 2 divisors, whose sum is σ = 9689522. Its totient is φ = 9689520.

The previous prime is 9689483. The next prime is 9689531. The reversal of 9689521 is 1259869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 3857296 = 2415^2 + 1964^2 .

It is a cyclic number.

It is not a de Polignac number, because 9689521 - 2¹⁵ = 9656753 is a prime.

It is not a weakly prime, because it can be changed into another prime (9689531) 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, 4844760 + 4844761.

It is an arithmetic number, because the mean of its divisors is an integer number (4844761).

Almost surely, 2^9689521 is an apocalyptic number.

It is an amenable number.

9689521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689521 is an equidigital number, since it uses as much as digits as its factorization.

9689521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 9689521 is about 3112.7995438190. The cubic root of 9689521 is about 213.1902977279.

The spelling of 9689521 in words is "nine million, six hundred eighty-nine thousand, five hundred twenty-one".