3709645 has 4 divisors (see below), whose sum is σ = 4451580. Its totient is φ = 2967712.

The previous prime is 3709633. The next prime is 3709661. The reversal of 3709645 is 5469073.

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 1359556 + 2350089 = 1166^2 + 1533^2 .

It is a cyclic number.

It is not a de Polignac number, because 3709645 - 2¹⁷ = 3578573 is a prime.

It is a super-3 number, since 3×3709645³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 3709645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370960 + ... + 370969.

It is an arithmetic number, because the mean of its divisors is an integer number (1112895).

Almost surely, 2^3709645 is an apocalyptic number.

It is an amenable number.

3709645 is a deficient number, since it is larger than the sum of its proper divisors (741935).

3709645 is an equidigital number, since it uses as much as digits as its factorization.

3709645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741934.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 3709645 is about 1926.0438728129. The cubic root of 3709645 is about 154.8023147524.

The spelling of 3709645 in words is "three million, seven hundred nine thousand, six hundred forty-five".