3686979 has 4 divisors (see below), whose sum is σ = 4915976. Its totient is φ = 2457984.

The previous prime is 3686971. The next prime is 3686983. The reversal of 3686979 is 9796863.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9796863 = 3 ⋅3265621.

It is not a de Polignac number, because 3686979 - 2³ = 3686971 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3686971) 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, 614494 + ... + 614499.

It is an arithmetic number, because the mean of its divisors is an integer number (1228994).

Almost surely, 2^3686979 is an apocalyptic number.

3686979 is a deficient number, since it is larger than the sum of its proper divisors (1228997).

3686979 is a wasteful number, since it uses less digits than its factorization.

3686979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228996.

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

The square root of 3686979 is about 1920.1507753299. The cubic root of 3686979 is about 154.4863887633.

The spelling of 3686979 in words is "three million, six hundred eighty-six thousand, nine hundred seventy-nine".