9946365809 has 2 divisors, whose sum is σ = 9946365810. Its totient is φ = 9946365808.

The previous prime is 9946365739. The next prime is 9946365833. The reversal of 9946365809 is 9085636499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8025472225 + 1920893584 = 89585^2 + 43828^2 .

It is an emirp because it is prime and its reverse (9085636499) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9946365809 is a prime.

It is not a weakly prime, because it can be changed into another prime (9946365889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4973182904 + 4973182905.

It is an arithmetic number, because the mean of its divisors is an integer number (4973182905).

Almost surely, 2^9946365809 is an apocalyptic number.

It is an amenable number.

9946365809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9946365809 is an equidigital number, since it uses as much as digits as its factorization.

9946365809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12597120, while the sum is 59.

The square root of 9946365809 is about 99731.4684991653. The cubic root of 9946365809 is about 2150.5760712691.

The spelling of 9946365809 in words is "nine billion, nine hundred forty-six million, three hundred sixty-five thousand, eight hundred nine".