999000973 has 4 divisors (see below), whose sum is σ = 999070848.
Its totient is φ = 998931100.
The previous prime is 999000967. The next prime is 999000991. The reversal of 999000973 is 379000999.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is not a de Polignac number, because 999000973 - 25 = 999000941 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (999000953) 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 3 ways as a sum of consecutive naturals, for example, 4861 + ... + 44962.
It is an arithmetic number, because the mean of its divisors is an integer number (249767712).
Almost surely, 2999000973 is an apocalyptic number.
It is an amenable number.
999000973 is a deficient number, since it is larger than the sum of its proper divisors (69875).
999000973 is a wasteful number, since it uses less digits than its factorization.
999000973 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 69874.
The product of its (nonzero) digits is 137781, while the sum is 46.
The square root of 999000973 is about 31606.9766507333.
The cubic root of 999000973 is about 999.6668800434.
Note that the first 3 decimals are identical.
The spelling of 999000973 in words is "nine hundred ninety-nine million, nine hundred seventy-three", and thus it is an aban number.