3986679 has 4 divisors (see below), whose sum is σ = 5315576. Its totient is φ = 2657784.

The previous prime is 3986677. The next prime is 3986699. The reversal of 3986679 is 9766893.

It is a happy number.

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

It is not a de Polignac number, because 3986679 - 2¹ = 3986677 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 (3986677) 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, 664444 + ... + 664449.

It is an arithmetic number, because the mean of its divisors is an integer number (1328894).

Almost surely, 2^3986679 is an apocalyptic number.

3986679 is a deficient number, since it is larger than the sum of its proper divisors (1328897).

3986679 is a wasteful number, since it uses less digits than its factorization.

3986679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328896.

The product of its digits is 489888, while the sum is 48.

The square root of 3986679 is about 1996.6669727323. Note that the first 3 decimals coincide. The cubic root of 3986679 is about 158.5636944759.

The spelling of 3986679 in words is "three million, nine hundred eighty-six thousand, six hundred seventy-nine".