9684139909 has 2 divisors, whose sum is σ = 9684139910. Its totient is φ = 9684139908.

The previous prime is 9684139901. The next prime is 9684139919. The reversal of 9684139909 is 9099314869.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9221760900 + 462379009 = 96030^2 + 21503^2 .

It is a cyclic number.

It is not a de Polignac number, because 9684139909 - 2³ = 9684139901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9684139901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4842069954 + 4842069955.

It is an arithmetic number, because the mean of its divisors is an integer number (4842069955).

Almost surely, 2^9684139909 is an apocalyptic number.

It is an amenable number.

9684139909 is a deficient number, since it is larger than the sum of its proper divisors (1).

9684139909 is an equidigital number, since it uses as much as digits as its factorization.

9684139909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The square root of 9684139909 is about 98408.0276654298. The cubic root of 9684139909 is about 2131.5082522896.

The spelling of 9684139909 in words is "nine billion, six hundred eighty-four million, one hundred thirty-nine thousand, nine hundred nine".