999000971 has 4 divisors (see below), whose sum is σ = 1057765752. Its totient is φ = 940236192.

The previous prime is 999000967. The next prime is 999000991. The reversal of 999000971 is 179000999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179000999 = 109 ⋅1642211.

It is a cyclic number.

It is not a de Polignac number, because 999000971 - 2² = 999000967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999000901) 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, 29382365 + ... + 29382398.

It is an arithmetic number, because the mean of its divisors is an integer number (264441438).

Almost surely, 2^999000971 is an apocalyptic number.

999000971 is a deficient number, since it is larger than the sum of its proper divisors (58764781).

999000971 is a wasteful number, since it uses less digits than its factorization.

999000971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58764780.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 999000971 is about 31606.9766190947. The cubic root of 999000971 is about 999.6668793763. Note that the first 3 decimals are identical.

The spelling of 999000971 in words is "nine hundred ninety-nine million, nine hundred seventy-one", and thus it is an aban number.