38720803784309 has 2 divisors, whose sum is σ = 38720803784310. Its totient is φ = 38720803784308.

The previous prime is 38720803784287. The next prime is 38720803784347. The reversal of 38720803784309 is 90348730802783.

38720803784309 is digitally balanced in base 2, 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., 34651506221809 + 4069297562500 = 5886553^2 + 2017250^2 .

It is a cyclic number.

It is not a de Polignac number, because 38720803784309 - 2³² = 38716508817013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38720803784389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19360401892154 + 19360401892155.

It is an arithmetic number, because the mean of its divisors is an integer number (19360401892155).

Almost surely, 2^{38720803784309} is an apocalyptic number.

It is an amenable number.

38720803784309 is a deficient number, since it is larger than the sum of its proper divisors (1).

38720803784309 is an equidigital number, since it uses as much as digits as its factorization.

38720803784309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 62.

The spelling of 38720803784309 in words is "thirty-eight trillion, seven hundred twenty billion, eight hundred three million, seven hundred eighty-four thousand, three hundred nine".