3613865 has 8 divisors (see below), whose sum is σ = 4396488. Its totient is φ = 2851200.

The previous prime is 3613847. The next prime is 3613867. The reversal of 3613865 is 5683163.

3613865 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 1315609 + 2298256 = 1147^2 + 1516^2 .

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

It is not a de Polignac number, because 3613865 - 2⁸ = 3613609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3613867) 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, 4586 + ... + 5315.

It is an arithmetic number, because the mean of its divisors is an integer number (549561).

Almost surely, 2^3613865 is an apocalyptic number.

It is an amenable number.

3613865 is a deficient number, since it is larger than the sum of its proper divisors (782623).

3613865 is an equidigital number, since it uses as much as digits as its factorization.

3613865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9979.

The product of its digits is 12960, while the sum is 32.

The square root of 3613865 is about 1901.0168331711. The cubic root of 3613865 is about 153.4583914641.

The spelling of 3613865 in words is "three million, six hundred thirteen thousand, eight hundred sixty-five".