39489638389 has 2 divisors, whose sum is σ = 39489638390. Its totient is φ = 39489638388.

The previous prime is 39489638339. The next prime is 39489638407. The reversal of 39489638389 is 98383698493.

39489638389 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., 26997776100 + 12491862289 = 164310^2 + 111767^2 .

It is an emirp because it is prime and its reverse (98383698493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39489638389 - 2¹⁹ = 39489114101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39489638339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19744819194 + 19744819195.

It is an arithmetic number, because the mean of its divisors is an integer number (19744819195).

Almost surely, 2^39489638389 is an apocalyptic number.

It is an amenable number.

39489638389 is a deficient number, since it is larger than the sum of its proper divisors (1).

39489638389 is an equidigital number, since it uses as much as digits as its factorization.

39489638389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241864704, while the sum is 70.

The spelling of 39489638389 in words is "thirty-nine billion, four hundred eighty-nine million, six hundred thirty-eight thousand, three hundred eighty-nine".