3655959 has 4 divisors (see below), whose sum is σ = 4874616. Its totient is φ = 2437304.

The previous prime is 3655957. The next prime is 3655987. The reversal of 3655959 is 9595563.

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

It is a cyclic number.

It is not a de Polignac number, because 3655959 - 2¹ = 3655957 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 3655959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609324 + ... + 609329.

It is an arithmetic number, because the mean of its divisors is an integer number (1218654).

Almost surely, 2^3655959 is an apocalyptic number.

3655959 is a deficient number, since it is larger than the sum of its proper divisors (1218657).

3655959 is a wasteful number, since it uses less digits than its factorization.

3655959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218656.

The product of its digits is 182250, while the sum is 42.

The square root of 3655959 is about 1912.0562230227. The cubic root of 3655959 is about 154.0519164927.

The spelling of 3655959 in words is "three million, six hundred fifty-five thousand, nine hundred fifty-nine".