128403738439 has 2 divisors, whose sum is σ = 128403738440. Its totient is φ = 128403738438.

The previous prime is 128403738301. The next prime is 128403738461. The reversal of 128403738439 is 934837304821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128403738439 - 2³¹ = 126256254791 is a prime.

It is a super-2 number, since 2×128403738439² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128403748439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64201869219 + 64201869220.

It is an arithmetic number, because the mean of its divisors is an integer number (64201869220).

Almost surely, 2^128403738439 is an apocalyptic number.

128403738439 is a deficient number, since it is larger than the sum of its proper divisors (1).

128403738439 is an equidigital number, since it uses as much as digits as its factorization.

128403738439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 128403738439 in words is "one hundred twenty-eight billion, four hundred three million, seven hundred thirty-eight thousand, four hundred thirty-nine".