999000877 has 10 divisors (see below), whose sum is σ = 1165434478.
Its totient is φ = 856284408.
The previous prime is 999000841. The next prime is 999000901. The reversal of 999000877 is 778000999.
It can be written as a sum of positive squares in only one way, i.e., 881733636 + 117267241 = 29694^2 + 10829^2
It is not a de Polignac number, because 999000877 - 215 = 998968109 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (49).
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 999000877.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (999000817) 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 9 ways as a sum of consecutive naturals, for example, 205638 + ... + 210439.
Almost surely, 2999000877 is an apocalyptic number.
It is an amenable number.
999000877 is a deficient number, since it is larger than the sum of its proper divisors (166433601).
999000877 is an frugal number, since it uses more digits than its factorization.
999000877 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 416105 (or 416084 counting only the distinct ones).
The product of its (nonzero) digits is 285768, while the sum is 49.
The square root of 999000877 is about 31606.9751320812.
The cubic root of 999000877 is about 999.6668480221.
Note that the first 3 decimals are identical.
The spelling of 999000877 in words is "nine hundred ninety-nine million, eight hundred seventy-seven", and thus it is an aban number.