3986979 has 16 divisors (see below), whose sum is σ = 5654400. Its totient is φ = 2491776.

The previous prime is 3986977. The next prime is 3986987. The reversal of 3986979 is 9796893.

It is not a de Polignac number, because 3986979 - 2¹ = 3986977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3986971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6132 + ... + 6750.

It is an arithmetic number, because the mean of its divisors is an integer number (353400).

Almost surely, 2^3986979 is an apocalyptic number.

3986979 is a deficient number, since it is larger than the sum of its proper divisors (1667421).

3986979 is a wasteful number, since it uses less digits than its factorization.

3986979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754.

The product of its digits is 734832, while the sum is 51.

The square root of 3986979 is about 1996.7420965162. The cubic root of 3986979 is about 158.5676717141.

The spelling of 3986979 in words is "three million, nine hundred eighty-six thousand, nine hundred seventy-nine".