3653689 has 4 divisors (see below), whose sum is σ = 3934756. Its totient is φ = 3372624.

The previous prime is 3653687. The next prime is 3653701. The reversal of 3653689 is 9863563.

3653689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9863563 = 2339 ⋅4217.

It can be written as a sum of positive squares in 2 ways, for example, as 705600 + 2948089 = 840^2 + 1717^2 .

It is a cyclic number.

It is not a de Polignac number, because 3653689 - 2¹ = 3653687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3653687) 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, 140514 + ... + 140539.

It is an arithmetic number, because the mean of its divisors is an integer number (983689).

Almost surely, 2^3653689 is an apocalyptic number.

It is an amenable number.

3653689 is a deficient number, since it is larger than the sum of its proper divisors (281067).

3653689 is a wasteful number, since it uses less digits than its factorization.

3653689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281066.

The product of its digits is 116640, while the sum is 40.

The square root of 3653689 is about 1911.4625290599. The cubic root of 3653689 is about 154.0200260683.

The spelling of 3653689 in words is "three million, six hundred fifty-three thousand, six hundred eighty-nine".