999604 has 12 divisors (see below), whose sum is σ = 1757700. Its totient is φ = 497408.

The previous prime is 999599. The next prime is 999611. The reversal of 999604 is 406999.

It can be written as a sum of positive squares in 2 ways, for example, as 39204 + 960400 = 198^2 + 980^2 .

It is a congruent number.

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, 612 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (146475).

2⁹⁹⁹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

999604 is a deficient number, since it is larger than the sum of its proper divisors (758096).

999604 is a wasteful number, since it uses less digits than its factorization.

999604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202 (or 1200 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 999604 is about 999.8019803941. The cubic root of 999604 is about 99.9867982572.

The spelling of 999604 in words is "nine hundred ninety-nine thousand, six hundred four".