128708099539 has 2 divisors, whose sum is σ = 128708099540. Its totient is φ = 128708099538.

The previous prime is 128708099479. The next prime is 128708099563. The reversal of 128708099539 is 935990807821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128708099539 is a prime.

It is a super-2 number, since 2×128708099539² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128708094539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64354049769 + 64354049770.

It is an arithmetic number, because the mean of its divisors is an integer number (64354049770).

Almost surely, 2^128708099539 is an apocalyptic number.

128708099539 is a deficient number, since it is larger than the sum of its proper divisors (1).

128708099539 is an equidigital number, since it uses as much as digits as its factorization.

128708099539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 128708099539 in words is "one hundred twenty-eight billion, seven hundred eight million, ninety-nine thousand, five hundred thirty-nine".