128959443 has 12 divisors (see below), whose sum is σ = 186873960. Its totient is φ = 85696416.

The previous prime is 128959409. The next prime is 128959469. The reversal of 128959443 is 344959821.

128959443 is a `hidden beast` number, since 12 + 8 + 9 + 594 + 43 = 666.

It is not a de Polignac number, because 128959443 - 2¹² = 128955347 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (128959043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20073 + ... + 25706.

It is an arithmetic number, because the mean of its divisors is an integer number (15572830).

Almost surely, 2^128959443 is an apocalyptic number.

128959443 is a deficient number, since it is larger than the sum of its proper divisors (57914517).

128959443 is a wasteful number, since it uses less digits than its factorization.

128959443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46098 (or 46095 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 128959443 is about 11356.0311288760. The cubic root of 128959443 is about 505.2244768788.

The spelling of 128959443 in words is "one hundred twenty-eight million, nine hundred fifty-nine thousand, four hundred forty-three".