128776793 has 8 divisors (see below), whose sum is σ = 134510208. Its totient is φ = 123054624.

The previous prime is 128776783. The next prime is 128776807. The reversal of 128776793 is 397677821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128776793 - 2¹⁰ = 128775769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128776783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27821 + ... + 32117.

It is an arithmetic number, because the mean of its divisors is an integer number (16813776).

Almost surely, 2^128776793 is an apocalyptic number.

It is an amenable number.

128776793 is a deficient number, since it is larger than the sum of its proper divisors (5733415).

128776793 is a wasteful number, since it uses less digits than its factorization.

128776793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623.

The product of its digits is 889056, while the sum is 50.

The square root of 128776793 is about 11347.9862971366. The cubic root of 128776793 is about 504.9858415140.

The spelling of 128776793 in words is "one hundred twenty-eight million, seven hundred seventy-six thousand, seven hundred ninety-three".