128746843 has 4 divisors (see below), whose sum is σ = 128982760. Its totient is φ = 128510928.

The previous prime is 128746841. The next prime is 128746879. The reversal of 128746843 is 348647821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348647821 = 881 ⋅395741.

It is a cyclic number.

It is not a de Polignac number, because 128746843 - 2¹ = 128746841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128746843.

It is not an unprimeable number, because it can be changed into a prime (128746841) 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, 117138 + ... + 118231.

It is an arithmetic number, because the mean of its divisors is an integer number (32245690).

Almost surely, 2^128746843 is an apocalyptic number.

128746843 is a deficient number, since it is larger than the sum of its proper divisors (235917).

128746843 is an equidigital number, since it uses as much as digits as its factorization.

128746843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235916.

The product of its digits is 258048, while the sum is 43.

The square root of 128746843 is about 11346.6666030161. Note that the first 4 decimals coincide. The cubic root of 128746843 is about 504.9466897945.

The spelling of 128746843 in words is "one hundred twenty-eight million, seven hundred forty-six thousand, eight hundred forty-three".