38788281209 has 2 divisors, whose sum is σ = 38788281210. Its totient is φ = 38788281208.

The previous prime is 38788281167. The next prime is 38788281221. The reversal of 38788281209 is 90218288783.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38326675984 + 461605225 = 195772^2 + 21485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38788281209 is a prime.

It is not a weakly prime, because it can be changed into another prime (38788281269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19394140604 + 19394140605.

It is an arithmetic number, because the mean of its divisors is an integer number (19394140605).

Almost surely, 2^38788281209 is an apocalyptic number.

It is an amenable number.

38788281209 is a deficient number, since it is larger than the sum of its proper divisors (1).

38788281209 is an equidigital number, since it uses as much as digits as its factorization.

38788281209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 38788281209 in words is "thirty-eight billion, seven hundred eighty-eight million, two hundred eighty-one thousand, two hundred nine".