3966491 has 4 divisors (see below), whose sum is σ = 4199832. Its totient is φ = 3733152.

The previous prime is 3966439. The next prime is 3966503. The reversal of 3966491 is 1946693.

3966491 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3966491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3966091) 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, 116645 + ... + 116678.

It is an arithmetic number, because the mean of its divisors is an integer number (1049958).

Almost surely, 2^3966491 is an apocalyptic number.

3966491 is a deficient number, since it is larger than the sum of its proper divisors (233341).

3966491 is a wasteful number, since it uses less digits than its factorization.

3966491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233340.

The product of its digits is 34992, while the sum is 38.

The square root of 3966491 is about 1991.6051315459. The cubic root of 3966491 is about 158.2955930979.

The spelling of 3966491 in words is "three million, nine hundred sixty-six thousand, four hundred ninety-one".