39045609817 has 2 divisors, whose sum is σ = 39045609818. Its totient is φ = 39045609816.

The previous prime is 39045609763. The next prime is 39045609833. The reversal of 39045609817 is 71890654093.

It is a happy number.

39045609817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38392091721 + 653518096 = 195939^2 + 25564^2 .

It is a cyclic number.

It is not a de Polignac number, because 39045609817 - 2⁷ = 39045609689 is a prime.

It is not a weakly prime, because it can be changed into another prime (39045609887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19522804908 + 19522804909.

It is an arithmetic number, because the mean of its divisors is an integer number (19522804909).

Almost surely, 2^39045609817 is an apocalyptic number.

It is an amenable number.

39045609817 is a deficient number, since it is larger than the sum of its proper divisors (1).

39045609817 is an equidigital number, since it uses as much as digits as its factorization.

39045609817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 39045609817 in words is "thirty-nine billion, forty-five million, six hundred nine thousand, eight hundred seventeen".