128089243 has 4 divisors (see below), whose sum is σ = 128194528. Its totient is φ = 127983960.

The previous prime is 128089211. The next prime is 128089307. The reversal of 128089243 is 342980821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342980821 = 811 ⋅422911.

It is a cyclic number.

It is not a de Polignac number, because 128089243 - 2⁵ = 128089211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128089343) 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, 50796 + ... + 53257.

It is an arithmetic number, because the mean of its divisors is an integer number (32048632).

Almost surely, 2^128089243 is an apocalyptic number.

128089243 is a deficient number, since it is larger than the sum of its proper divisors (105285).

128089243 is a wasteful number, since it uses less digits than its factorization.

128089243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105284.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 128089243 is about 11317.6518324253. The cubic root of 128089243 is about 504.0855168466.

The spelling of 128089243 in words is "one hundred twenty-eight million, eighty-nine thousand, two hundred forty-three".