608704639 has 4 divisors (see below), whose sum is σ = 609798024. Its totient is φ = 607611256.

The previous prime is 608704633. The next prime is 608704643. The reversal of 608704639 is 936407806.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936407806 = 2 ⋅468203903.

It is a cyclic number.

It is not a de Polignac number, because 608704639 - 2²⁵ = 575150207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 608704595 and 608704604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (608704633) 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, 545857 + ... + 546970.

It is an arithmetic number, because the mean of its divisors is an integer number (152449506).

Almost surely, 2^608704639 is an apocalyptic number.

608704639 is a deficient number, since it is larger than the sum of its proper divisors (1093385).

608704639 is a wasteful number, since it uses less digits than its factorization.

608704639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093384.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 608704639 is about 24671.9403168863. The cubic root of 608704639 is about 847.4918631439.

The spelling of 608704639 in words is "six hundred eight million, seven hundred four thousand, six hundred thirty-nine".