3979805 has 8 divisors (see below), whose sum is σ = 4983552. Its totient is φ = 3045328.

The previous prime is 3979771. The next prime is 3979837. The reversal of 3979805 is 5089793.

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 3979805 - 2¹⁰ = 3978781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 17189 + ... + 17418.

It is an arithmetic number, because the mean of its divisors is an integer number (622944).

Almost surely, 2^3979805 is an apocalyptic number.

It is an amenable number.

3979805 is a deficient number, since it is larger than the sum of its proper divisors (1003747).

3979805 is a wasteful number, since it uses less digits than its factorization.

3979805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34635.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 3979805 is about 1994.9448613934. The cubic root of 3979805 is about 158.4725079778.

The spelling of 3979805 in words is "three million, nine hundred seventy-nine thousand, eight hundred five".