605605989 has 4 divisors (see below), whose sum is σ = 807474656. Its totient is φ = 403737324.

The previous prime is 605605969. The next prime is 605605997. The reversal of 605605989 is 989506506.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 605605989 - 2²⁰ = 604557413 is a prime.

It is a super-3 number, since 3×605605989³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605605919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100934329 + ... + 100934334.

It is an arithmetic number, because the mean of its divisors is an integer number (201868664).

Almost surely, 2^605605989 is an apocalyptic number.

It is an amenable number.

605605989 is a deficient number, since it is larger than the sum of its proper divisors (201868667).

605605989 is a wasteful number, since it uses less digits than its factorization.

605605989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201868666.

The product of its (nonzero) digits is 583200, while the sum is 48.

The square root of 605605989 is about 24609.0631475479. The cubic root of 605605989 is about 846.0513454633.

The spelling of 605605989 in words is "six hundred five million, six hundred five thousand, nine hundred eighty-nine".