999000945 has 24 divisors (see below), whose sum is σ = 1795737216. Its totient is φ = 532799856.

The previous prime is 999000941. The next prime is 999000949. The reversal of 999000945 is 549000999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (999000941) and next prime (999000949).

It is not a de Polignac number, because 999000945 - 2² = 999000941 is a prime.

It is a super-2 number, since 2×999000945² = 1996005776221786050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 999000945.

It is not an unprimeable number, because it can be changed into a prime (999000941) 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 23 ways as a sum of consecutive naturals, for example, 409897 + ... + 412326.

It is an arithmetic number, because the mean of its divisors is an integer number (74822384).

Almost surely, 2^999000945 is an apocalyptic number.

It is an amenable number.

999000945 is a deficient number, since it is larger than the sum of its proper divisors (796736271).

999000945 is an equidigital number, since it uses as much as digits as its factorization.

999000945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822243 (or 822231 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 999000945 is about 31606.9762077931. The cubic root of 999000945 is about 999.6668707039. Note that the first 3 decimals are identical.

The spelling of 999000945 in words is "nine hundred ninety-nine million, nine hundred forty-five", and thus it is an aban number.