3705689 has 8 divisors (see below), whose sum is σ = 4057032. Its totient is φ = 3363840.

The previous prime is 3705679. The next prime is 3705719. The reversal of 3705689 is 9865073.

3705689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 126025 + 3579664 = 355^2 + 1892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3705689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3705619) 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 7 ways as a sum of consecutive naturals, for example, 1544 + ... + 3129.

It is an arithmetic number, because the mean of its divisors is an integer number (507129).

Almost surely, 2^3705689 is an apocalyptic number.

It is an amenable number.

3705689 is a deficient number, since it is larger than the sum of its proper divisors (351343).

3705689 is a wasteful number, since it uses less digits than its factorization.

3705689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 3705689 is about 1925.0166233048. The cubic root of 3705689 is about 154.7472676364.

The spelling of 3705689 in words is "three million, seven hundred five thousand, six hundred eighty-nine".