3969839 has 8 divisors (see below), whose sum is σ = 4128960. Its totient is φ = 3812256.

The previous prime is 3969827. The next prime is 3969853. The reversal of 3969839 is 9389693.

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 3969839 - 2⁸ = 3969583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3969793 and 3969802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969809) 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, 10457 + ... + 10829.

It is an arithmetic number, because the mean of its divisors is an integer number (516120).

Almost surely, 2^3969839 is an apocalyptic number.

3969839 is a deficient number, since it is larger than the sum of its proper divisors (159121).

3969839 is a wasteful number, since it uses less digits than its factorization.

3969839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its digits is 314928, while the sum is 47.

The square root of 3969839 is about 1992.4454823156. The cubic root of 3969839 is about 158.3401181457.

The spelling of 3969839 in words is "three million, nine hundred sixty-nine thousand, eight hundred thirty-nine".