3005689 has 4 divisors (see below), whose sum is σ = 3012724. Its totient is φ = 2998656.

The previous prime is 3005677. The next prime is 3005693. The reversal of 3005689 is 9865003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9865003 = 619 ⋅15937.

It can be written as a sum of positive squares in 2 ways, for example, as 2839225 + 166464 = 1685^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 3005689 - 2¹¹ = 3003641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3005689.

It is not an unprimeable number, because it can be changed into a prime (3005609) 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, 2832 + ... + 3745.

It is an arithmetic number, because the mean of its divisors is an integer number (753181).

Almost surely, 2^3005689 is an apocalyptic number.

It is an amenable number.

3005689 is a deficient number, since it is larger than the sum of its proper divisors (7035).

3005689 is an equidigital number, since it uses as much as digits as its factorization.

3005689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 3005689 is about 1733.6923025727. The cubic root of 3005689 is about 144.3160656620.

The spelling of 3005689 in words is "three million, five thousand, six hundred eighty-nine".