6608391 has 4 divisors (see below), whose sum is σ = 8811192. Its totient is φ = 4405592.

The previous prime is 6608387. The next prime is 6608417. The reversal of 6608391 is 1938066.

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 6608391 - 2² = 6608387 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6608321) 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, 1101396 + ... + 1101401.

It is an arithmetic number, because the mean of its divisors is an integer number (2202798).

Almost surely, 2^6608391 is an apocalyptic number.

6608391 is a deficient number, since it is larger than the sum of its proper divisors (2202801).

6608391 is a wasteful number, since it uses less digits than its factorization.

6608391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202800.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 6608391 is about 2570.6790931581. The cubic root of 6608391 is about 187.6572050471.

The spelling of 6608391 in words is "six million, six hundred eight thousand, three hundred ninety-one".