128708099479 has 2 divisors, whose sum is σ = 128708099480. Its totient is φ = 128708099478.

The previous prime is 128708099461. The next prime is 128708099539. The reversal of 128708099479 is 974990807821.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (974990807821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128708099479 - 2¹¹ = 128708097431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128708099479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128708099459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64354049739 + 64354049740.

It is an arithmetic number, because the mean of its divisors is an integer number (64354049740).

Almost surely, 2^128708099479 is an apocalyptic number.

128708099479 is a deficient number, since it is larger than the sum of its proper divisors (1).

128708099479 is an equidigital number, since it uses as much as digits as its factorization.

128708099479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 64.

The spelling of 128708099479 in words is "one hundred twenty-eight billion, seven hundred eight million, ninety-nine thousand, four hundred seventy-nine".