999705 has 16 divisors (see below), whose sum is σ = 1828224. Its totient is φ = 456960.

The previous prime is 999683. The next prime is 999721. The reversal of 999705 is 507999.

It is not a de Polignac number, because 999705 - 2¹⁰ = 998681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4656 + ... + 4865.

It is an arithmetic number, because the mean of its divisors is an integer number (114264).

2⁹⁹⁹⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

999705 is a deficient number, since it is larger than the sum of its proper divisors (828519).

999705 is a wasteful number, since it uses less digits than its factorization.

999705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536.

The product of its (nonzero) digits is 25515, while the sum is 39.

The square root of 999705 is about 999.8524891203. The cubic root of 999705 is about 99.9901656996.

The spelling of 999705 in words is "nine hundred ninety-nine thousand, seven hundred five".