3936665 has 4 divisors (see below), whose sum is σ = 4724004. Its totient is φ = 3149328.

The previous prime is 3936643. The next prime is 3936683. The reversal of 3936665 is 5666393.

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 2778889 + 1157776 = 1667^2 + 1076^2 .

It is a cyclic number.

It is not a de Polignac number, because 3936665 - 2¹⁶ = 3871129 is a prime.

It is a Duffinian 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, 393662 + ... + 393671.

It is an arithmetic number, because the mean of its divisors is an integer number (1181001).

Almost surely, 2^3936665 is an apocalyptic number.

It is an amenable number.

3936665 is a deficient number, since it is larger than the sum of its proper divisors (787339).

3936665 is an equidigital number, since it uses as much as digits as its factorization.

3936665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787338.

The product of its digits is 87480, while the sum is 38.

The square root of 3936665 is about 1984.1030719194. The cubic root of 3936665 is about 157.8978269083.

The spelling of 3936665 in words is "three million, nine hundred thirty-six thousand, six hundred sixty-five".