999000845 has 8 divisors (see below), whose sum is σ = 1240139160. Its totient is φ = 771641920.

The previous prime is 999000841. The next prime is 999000901. The reversal of 999000845 is 548000999.

It can be written as a sum of positive squares in 4 ways, for example, as 630436 + 998370409 = 794^2 + 31597^2 .

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

It is not a de Polignac number, because 999000845 - 2² = 999000841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999000796 and 999000805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999000841) 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, 3444686 + ... + 3444975.

It is an arithmetic number, because the mean of its divisors is an integer number (155017395).

Almost surely, 2^999000845 is an apocalyptic number.

It is an amenable number.

999000845 is a deficient number, since it is larger than the sum of its proper divisors (241138315).

999000845 is a wasteful number, since it uses less digits than its factorization.

999000845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889695.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 999000845 is about 31606.9746258638. The cubic root of 999000845 is about 999.6668373483. Note that the first 3 decimals are identical.

The spelling of 999000845 in words is "nine hundred ninety-nine million, eight hundred forty-five", and thus it is an aban number.