3993879 has 4 divisors (see below), whose sum is σ = 5325176. Its totient is φ = 2662584.

The previous prime is 3993859. The next prime is 3993889. The reversal of 3993879 is 9783993.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3993879 - 2⁷ = 3993751 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993839) 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 3 ways as a sum of consecutive naturals, for example, 665644 + ... + 665649.

It is an arithmetic number, because the mean of its divisors is an integer number (1331294).

Almost surely, 2^3993879 is an apocalyptic number.

3993879 is a deficient number, since it is larger than the sum of its proper divisors (1331297).

3993879 is a wasteful number, since it uses less digits than its factorization.

3993879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331296.

The product of its digits is 367416, while the sum is 48.

The square root of 3993879 is about 1998.4691641354. The cubic root of 3993879 is about 158.6590931779.

It can be divided in two parts, 399 and 3879, that added together give a triangular number (4278 = T₉₂).

The spelling of 3993879 in words is "three million, nine hundred ninety-three thousand, eight hundred seventy-nine".