128008070989 has 4 divisors (see below), whose sum is σ = 128571983424. Its totient is φ = 127444158556.

The previous prime is 128008070951. The next prime is 128008070999. The reversal of 128008070989 is 989070800821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989070800821 = 305867 ⋅3233663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128008070989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128008070999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281955877 + ... + 281956330.

It is an arithmetic number, because the mean of its divisors is an integer number (32142995856).

Almost surely, 2^128008070989 is an apocalyptic number.

It is an amenable number.

128008070989 is a deficient number, since it is larger than the sum of its proper divisors (563912435).

128008070989 is an equidigital number, since it uses as much as digits as its factorization.

128008070989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563912434.

The product of its (nonzero) digits is 580608, while the sum is 52.

The spelling of 128008070989 in words is "one hundred twenty-eight billion, eight million, seventy thousand, nine hundred eighty-nine".