128439338107 has 2 divisors, whose sum is σ = 128439338108. Its totient is φ = 128439338106.

The previous prime is 128439338101. The next prime is 128439338119. The reversal of 128439338107 is 701833934821.

It is a weak prime.

It is an emirp because it is prime and its reverse (701833934821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128439338107 is a prime.

It is not a weakly prime, because it can be changed into another prime (128439338101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64219669053 + 64219669054.

It is an arithmetic number, because the mean of its divisors is an integer number (64219669054).

Almost surely, 2^128439338107 is an apocalyptic number.

128439338107 is a deficient number, since it is larger than the sum of its proper divisors (1).

128439338107 is an equidigital number, since it uses as much as digits as its factorization.

128439338107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 49.

It can be divided in two parts, 1284393 and 38107, that added together give a square (1322500 = 1150²).

The spelling of 128439338107 in words is "one hundred twenty-eight billion, four hundred thirty-nine million, three hundred thirty-eight thousand, one hundred seven".