999128883 has 8 divisors (see below), whose sum is σ = 1337700496. Its totient is φ = 663321600.

The previous prime is 999128873. The next prime is 999128903. The reversal of 999128883 is 388821999.

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

It is not a de Polignac number, because 999128883 - 2⁹ = 999128371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999128873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690238 + ... + 691683.

It is an arithmetic number, because the mean of its divisors is an integer number (167212562).

Almost surely, 2^999128883 is an apocalyptic number.

999128883 is a deficient number, since it is larger than the sum of its proper divisors (338571613).

999128883 is a wasteful number, since it uses less digits than its factorization.

999128883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382165.

The product of its digits is 2239488, while the sum is 57.

The square root of 999128883 is about 31609.0000316366. Note that the first 4 decimals coincide. The cubic root of 999128883 is about 999.7095433097.

The spelling of 999128883 in words is "nine hundred ninety-nine million, one hundred twenty-eight thousand, eight hundred eighty-three".