608639 has 4 divisors (see below), whose sum is σ = 616056. Its totient is φ = 601224.

The previous prime is 608633. The next prime is 608653. The reversal of 608639 is 936806.

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 608639 - 2⁸ = 608383 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (608633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3584 + ... + 3749.

It is an arithmetic number, because the mean of its divisors is an integer number (154014).

2⁶⁰⁸⁶³⁹ is an apocalyptic number.

608639 is a deficient number, since it is larger than the sum of its proper divisors (7417).

608639 is an equidigital number, since it uses as much as digits as its factorization.

608639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7416.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 608639 is about 780.1531900851. The cubic root of 608639 is about 84.7461399262.

The spelling of 608639 in words is "six hundred eight thousand, six hundred thirty-nine".