3869665 has 4 divisors (see below), whose sum is σ = 4643604. Its totient is φ = 3095728.

The previous prime is 3869653. The next prime is 3869683. The reversal of 3869665 is 5669683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5669683 = 31 ⋅182893.

It can be written as a sum of positive squares in 2 ways, for example, as 1347921 + 2521744 = 1161^2 + 1588^2 .

It is a cyclic number.

It is not a de Polignac number, because 3869665 - 2⁹ = 3869153 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, 386962 + ... + 386971.

It is an arithmetic number, because the mean of its divisors is an integer number (1160901).

Almost surely, 2^3869665 is an apocalyptic number.

It is an amenable number.

3869665 is a deficient number, since it is larger than the sum of its proper divisors (773939).

3869665 is an equidigital number, since it uses as much as digits as its factorization.

3869665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773938.

The product of its digits is 233280, while the sum is 43.

The square root of 3869665 is about 1967.1464104128. The cubic root of 3869665 is about 156.9969166501.

The spelling of 3869665 in words is "three million, eight hundred sixty-nine thousand, six hundred sixty-five".