3940013 has 8 divisors (see below), whose sum is σ = 4912320. Its totient is φ = 3070080.

The previous prime is 3940009. The next prime is 3940021. The reversal of 3940013 is 3100493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3940013 - 2² = 3940009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25508 + ... + 25661.

It is an arithmetic number, because the mean of its divisors is an integer number (614040).

Almost surely, 2^3940013 is an apocalyptic number.

It is an amenable number.

3940013 is a deficient number, since it is larger than the sum of its proper divisors (972307).

3940013 is a wasteful number, since it uses less digits than its factorization.

3940013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51187.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 3940013 is about 1984.9465987779. The cubic root of 3940013 is about 157.9425764727.

The spelling of 3940013 in words is "three million, nine hundred forty thousand, thirteen".