128791043 has 4 divisors (see below), whose sum is σ = 132271920. Its totient is φ = 125310168.

The previous prime is 128790973. The next prime is 128791051. The reversal of 128791043 is 340197821.

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 128791043 - 2¹⁰ = 128790019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128790994 and 128791012.

It is not an unprimeable number, because it can be changed into a prime (128791073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1740383 + ... + 1740456.

It is an arithmetic number, because the mean of its divisors is an integer number (33067980).

Almost surely, 2^128791043 is an apocalyptic number.

128791043 is a deficient number, since it is larger than the sum of its proper divisors (3480877).

128791043 is an equidigital number, since it uses as much as digits as its factorization.

128791043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480876.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 128791043 is about 11348.6141444672. The cubic root of 128791043 is about 505.0044674963.

The spelling of 128791043 in words is "one hundred twenty-eight million, seven hundred ninety-one thousand, forty-three".