128689898343 has 4 divisors (see below), whose sum is σ = 171586531128. Its totient is φ = 85793265560.

The previous prime is 128689898341. The next prime is 128689898347. The reversal of 128689898343 is 343898986821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128689898343 - 2¹ = 128689898341 is a prime.

It is a super-2 number, since 2×128689898343² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128689898341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21448316388 + ... + 21448316393.

It is an arithmetic number, because the mean of its divisors is an integer number (42896632782).

Almost surely, 2^128689898343 is an apocalyptic number.

128689898343 is a deficient number, since it is larger than the sum of its proper divisors (42896632785).

128689898343 is an equidigital number, since it uses as much as digits as its factorization.

128689898343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42896632784.

The product of its digits is 143327232, while the sum is 69.

The spelling of 128689898343 in words is "one hundred twenty-eight billion, six hundred eighty-nine million, eight hundred ninety-eight thousand, three hundred forty-three".