39139256927209 has 2 divisors, whose sum is σ = 39139256927210. Its totient is φ = 39139256927208.

The previous prime is 39139256927191. The next prime is 39139256927237. The reversal of 39139256927209 is 90272965293193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29921687685184 + 9217569242025 = 5470072^2 + 3036045^2 .

It is a cyclic number.

It is not a de Polignac number, because 39139256927209 - 2²¹ = 39139254830057 is a prime.

It is not a weakly prime, because it can be changed into another prime (39139256928209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569628463604 + 19569628463605.

It is an arithmetic number, because the mean of its divisors is an integer number (19569628463605).

Almost surely, 2^{39139256927209} is an apocalyptic number.

It is an amenable number.

39139256927209 is a deficient number, since it is larger than the sum of its proper divisors (1).

39139256927209 is an equidigital number, since it uses as much as digits as its factorization.

39139256927209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 99202320, while the sum is 67.

The spelling of 39139256927209 in words is "thirty-nine trillion, one hundred thirty-nine billion, two hundred fifty-six million, nine hundred twenty-seven thousand, two hundred nine".