9668921 has 2 divisors, whose sum is σ = 9668922. Its totient is φ = 9668920.

The previous prime is 9668909. The next prime is 9668933. The reversal of 9668921 is 1298669.

It is a balanced prime because it is at equal distance from previous prime (9668909) and next prime (9668933).

It can be written as a sum of positive squares in only one way, i.e., 8970025 + 698896 = 2995^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 9668921 - 2¹⁰ = 9667897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9668941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4834460 + 4834461.

It is an arithmetic number, because the mean of its divisors is an integer number (4834461).

Almost surely, 2^9668921 is an apocalyptic number.

It is an amenable number.

9668921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9668921 is an equidigital number, since it uses as much as digits as its factorization.

9668921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 9668921 is about 3109.4888647493. The cubic root of 9668921 is about 213.0391091022.

The spelling of 9668921 in words is "nine million, six hundred sixty-eight thousand, nine hundred twenty-one".