605999 has 8 divisors (see below), whose sum is σ = 657360. Its totient is φ = 556416.

The previous prime is 605993. The next prime is 606017. The reversal of 605999 is 999506.

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

It is a cyclic number.

It is not a de Polignac number, because 605999 - 2¹² = 601903 is a prime.

It is a Duffinian number.

605999 is a modest number, since divided by 999 gives 605 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317 + ... + 1145.

It is an arithmetic number, because the mean of its divisors is an integer number (82170).

2⁶⁰⁵⁹⁹⁹ is an apocalyptic number.

605999 is a deficient number, since it is larger than the sum of its proper divisors (51361).

605999 is a wasteful number, since it uses less digits than its factorization.

605999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

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

The square root of 605999 is about 778.4593759471. The cubic root of 605999 is about 84.6234322289.

The spelling of 605999 in words is "six hundred five thousand, nine hundred ninety-nine".