3688209928309 has 2 divisors, whose sum is σ = 3688209928310. Its totient is φ = 3688209928308.

The previous prime is 3688209928289. The next prime is 3688209928343. The reversal of 3688209928309 is 9038299028863.

3688209928309 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., 3354960039025 + 333249889284 = 1831655^2 + 577278^2 .

It is a cyclic number.

It is not a de Polignac number, because 3688209928309 - 2⁹ = 3688209927797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3688209928709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1844104964154 + 1844104964155.

It is an arithmetic number, because the mean of its divisors is an integer number (1844104964155).

Almost surely, 2^{3688209928309} is an apocalyptic number.

It is an amenable number.

3688209928309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3688209928309 is an equidigital number, since it uses as much as digits as its factorization.

3688209928309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80621568, while the sum is 67.

The spelling of 3688209928309 in words is "three trillion, six hundred eighty-eight billion, two hundred nine million, nine hundred twenty-eight thousand, three hundred nine".