6613889 has 4 divisors (see below), whose sum is σ = 6636756. Its totient is φ = 6591024.

The previous prime is 6613883. The next prime is 6613891. The reversal of 6613889 is 9883166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3312400 + 3301489 = 1820^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 6613889 - 2¹² = 6609793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6613883) 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, 10994 + ... + 11579.

It is an arithmetic number, because the mean of its divisors is an integer number (1659189).

Almost surely, 2^6613889 is an apocalyptic number.

It is an amenable number.

6613889 is a deficient number, since it is larger than the sum of its proper divisors (22867).

6613889 is a wasteful number, since it uses less digits than its factorization.

6613889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22866.

The product of its digits is 62208, while the sum is 41.

The square root of 6613889 is about 2571.7482380669. The cubic root of 6613889 is about 187.7092325033.

The spelling of 6613889 in words is "six million, six hundred thirteen thousand, eight hundred eighty-nine".