3979839 has 4 divisors (see below), whose sum is σ = 5306456. Its totient is φ = 2653224.

The previous prime is 3979837. The next prime is 3979849. The reversal of 3979839 is 9389793.

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

It is not a de Polignac number, because 3979839 - 2¹ = 3979837 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 (3979837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663304 + ... + 663309.

It is an arithmetic number, because the mean of its divisors is an integer number (1326614).

Almost surely, 2^3979839 is an apocalyptic number.

3979839 is a deficient number, since it is larger than the sum of its proper divisors (1326617).

3979839 is a wasteful number, since it uses less digits than its factorization.

3979839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326616.

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

The square root of 3979839 is about 1994.9533829140. The cubic root of 3979839 is about 158.4729592603.

The spelling of 3979839 in words is "three million, nine hundred seventy-nine thousand, eight hundred thirty-nine".