999506 has 8 divisors (see below), whose sum is σ = 1521840. Its totient is φ = 492228.

The previous prime is 999499. The next prime is 999521. The reversal of 999506 is 605999.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 999506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3596 + ... + 3863.

It is an arithmetic number, because the mean of its divisors is an integer number (190230).

2⁹⁹⁹⁵⁰⁶ is an apocalyptic number.

999506 is a deficient number, since it is larger than the sum of its proper divisors (522334).

999506 is a wasteful number, since it uses less digits than its factorization.

999506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7528.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 999506 is about 999.7529694880. The cubic root of 999506 is about 99.9835306211.

The spelling of 999506 in words is "nine hundred ninety-nine thousand, five hundred six".