3993839 has 2 divisors, whose sum is σ = 3993840. Its totient is φ = 3993838.

The previous prime is 3993833. The next prime is 3993859. The reversal of 3993839 is 9383993.

It is a weak prime.

It is an emirp because it is prime and its reverse (9383993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3993839 - 2¹⁶ = 3928303 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3993839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3993833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996919 + 1996920.

It is an arithmetic number, because the mean of its divisors is an integer number (1996920).

Almost surely, 2^3993839 is an apocalyptic number.

3993839 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993839 is an equidigital number, since it uses as much as digits as its factorization.

3993839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 3993839 is about 1998.4591564503. The cubic root of 3993839 is about 158.6585635019.

The spelling of 3993839 in words is "three million, nine hundred ninety-three thousand, eight hundred thirty-nine".