3866939 has 4 divisors (see below), whose sum is σ = 4094424. Its totient is φ = 3639456.

The previous prime is 3866927. The next prime is 3866957. The reversal of 3866939 is 9396683.

3866939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9396683 = 67 ⋅140249.

It is a cyclic number.

It is not a de Polignac number, because 3866939 - 2⁴ = 3866923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3866939.

It is not an unprimeable number, because it can be changed into a prime (3866969) 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 3 ways as a sum of consecutive naturals, for example, 113717 + ... + 113750.

It is an arithmetic number, because the mean of its divisors is an integer number (1023606).

Almost surely, 2^3866939 is an apocalyptic number.

3866939 is a deficient number, since it is larger than the sum of its proper divisors (227485).

3866939 is a wasteful number, since it uses less digits than its factorization.

3866939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227484.

The product of its digits is 209952, while the sum is 44.

The square root of 3866939 is about 1966.4534065164. The cubic root of 3866939 is about 156.9600423013.

The spelling of 3866939 in words is "three million, eight hundred sixty-six thousand, nine hundred thirty-nine".