605406639 has 16 divisors (see below), whose sum is σ = 848740320. Its totient is φ = 383295360.

The previous prime is 605406631. The next prime is 605406661. The reversal of 605406639 is 936604506.

It is a happy number.

605406639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 605406639 - 2³ = 605406631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 605406597 and 605406606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605406631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51732 + ... + 62345.

It is an arithmetic number, because the mean of its divisors is an integer number (53046270).

Almost surely, 2^605406639 is an apocalyptic number.

605406639 is a deficient number, since it is larger than the sum of its proper divisors (243333681).

605406639 is a wasteful number, since it uses less digits than its factorization.

605406639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114170.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 605406639 is about 24605.0124771356. The cubic root of 605406639 is about 845.9585024551.

The spelling of 605406639 in words is "six hundred five million, four hundred six thousand, six hundred thirty-nine".