9956318909 has 2 divisors, whose sum is σ = 9956318910. Its totient is φ = 9956318908.

The previous prime is 9956318903. The next prime is 9956318917. The reversal of 9956318909 is 9098136599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9750970009 + 205348900 = 98747^2 + 14330^2 .

It is a cyclic number.

It is not a de Polignac number, because 9956318909 - 2³² = 5661351613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9956318903) 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, 4978159454 + 4978159455.

It is an arithmetic number, because the mean of its divisors is an integer number (4978159455).

Almost surely, 2^9956318909 is an apocalyptic number.

It is an amenable number.

9956318909 is a deficient number, since it is larger than the sum of its proper divisors (1).

9956318909 is an equidigital number, since it uses as much as digits as its factorization.

9956318909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4723920, while the sum is 59.

The square root of 9956318909 is about 99781.3555179524. The cubic root of 9956318909 is about 2151.2931761653.

The spelling of 9956318909 in words is "nine billion, nine hundred fifty-six million, three hundred eighteen thousand, nine hundred nine".