3866689 has 4 divisors (see below), whose sum is σ = 3956656. Its totient is φ = 3776724.

The previous prime is 3866651. The next prime is 3866713. The reversal of 3866689 is 9866683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3866689 - 2¹³ = 3858497 is a prime.

It is a Duffinian number.

3866689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3866609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44919 + ... + 45004.

It is an arithmetic number, because the mean of its divisors is an integer number (989164).

Almost surely, 2^3866689 is an apocalyptic number.

It is an amenable number.

3866689 is a deficient number, since it is larger than the sum of its proper divisors (89967).

3866689 is an equidigital number, since it uses as much as digits as its factorization.

3866689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89966.

The product of its digits is 373248, while the sum is 46.

The square root of 3866689 is about 1966.3898392740. The cubic root of 3866689 is about 156.9566597071.

The spelling of 3866689 in words is "three million, eight hundred sixty-six thousand, six hundred eighty-nine".