128550943 has 4 divisors (see below), whose sum is σ = 128776648. Its totient is φ = 128325240.

The previous prime is 128550907. The next prime is 128551001. The reversal of 128550943 is 349055821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349055821 = 19 ⋅18371359.

It is a cyclic number.

It is not a de Polignac number, because 128550943 - 2²¹ = 126453791 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 (128550343) 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, 111996 + ... + 113137.

It is an arithmetic number, because the mean of its divisors is an integer number (32194162).

Almost surely, 2^128550943 is an apocalyptic number.

128550943 is a deficient number, since it is larger than the sum of its proper divisors (225705).

128550943 is an equidigital number, since it uses as much as digits as its factorization.

128550943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225704.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 128550943 is about 11338.0308255005. The cubic root of 128550943 is about 504.6904523907.

The spelling of 128550943 in words is "one hundred twenty-eight million, five hundred fifty thousand, nine hundred forty-three".