3987679 has 4 divisors (see below), whose sum is σ = 3991680. Its totient is φ = 3983680.

The previous prime is 3987677. The next prime is 3987727. The reversal of 3987679 is 9767893.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3987679 - 2¹ = 3987677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987677) 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, 834 + ... + 2944.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^3987679 is an apocalyptic number.

3987679 is a deficient number, since it is larger than the sum of its proper divisors (4001).

3987679 is a wasteful number, since it uses less digits than its factorization.

3987679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000.

The product of its digits is 571536, while the sum is 49.

The square root of 3987679 is about 1996.9173743548. The cubic root of 3987679 is about 158.5769511606.

Subtracting from 3987679 its product of digits (571536), we obtain a palindrome (3416143).

The spelling of 3987679 in words is "three million, nine hundred eighty-seven thousand, six hundred seventy-nine".