605605999 has 4 divisors (see below), whose sum is σ = 611602200. Its totient is φ = 599609800.

The previous prime is 605605997. The next prime is 605606003. The reversal of 605605999 is 999506506.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 605605999 - 2¹ = 605605997 is a prime.

It is a super-3 number, since 3×605605999³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605605997) 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 3 ways as a sum of consecutive naturals, for example, 2997949 + ... + 2998150.

It is an arithmetic number, because the mean of its divisors is an integer number (152900550).

Almost surely, 2^605605999 is an apocalyptic number.

605605999 is a deficient number, since it is larger than the sum of its proper divisors (5996201).

605605999 is a wasteful number, since it uses less digits than its factorization.

605605999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5996200.

The product of its (nonzero) digits is 656100, while the sum is 49.

The square root of 605605999 is about 24609.0633507251. The cubic root of 605605999 is about 846.0513501201.

The spelling of 605605999 in words is "six hundred five million, six hundred five thousand, nine hundred ninety-nine".