3893665 has 4 divisors (see below), whose sum is σ = 4672404. Its totient is φ = 3114928.

The previous prime is 3893657. The next prime is 3893671. The reversal of 3893665 is 5663983.

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 2742336 + 1151329 = 1656^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 3893665 - 2³ = 3893657 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 389362 + ... + 389371.

It is an arithmetic number, because the mean of its divisors is an integer number (1168101).

Almost surely, 2^3893665 is an apocalyptic number.

It is an amenable number.

3893665 is a deficient number, since it is larger than the sum of its proper divisors (778739).

3893665 is an equidigital number, since it uses as much as digits as its factorization.

3893665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778738.

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

The square root of 3893665 is about 1973.2371879731. The cubic root of 3893665 is about 157.3208174753.

The spelling of 3893665 in words is "three million, eight hundred ninety-three thousand, six hundred sixty-five".