9968809 has 2 divisors, whose sum is σ = 9968810. Its totient is φ = 9968808.

The previous prime is 9968789. The next prime is 9968839. The reversal of 9968809 is 9088699.

9968809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9517225 + 451584 = 3085^2 + 672^2 .

It is an emirp because it is prime and its reverse (9088699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9968809 - 2⁹ = 9968297 is a prime.

It is not a weakly prime, because it can be changed into another prime (9968839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984404 + 4984405.

It is an arithmetic number, because the mean of its divisors is an integer number (4984405).

Almost surely, 2^9968809 is an apocalyptic number.

It is an amenable number.

9968809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9968809 is an equidigital number, since it uses as much as digits as its factorization.

9968809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 9968809 is about 3157.3420783944. The cubic root of 9968809 is about 215.2192391348.

The spelling of 9968809 in words is "nine million, nine hundred sixty-eight thousand, eight hundred nine".