3989979 has 40 divisors (see below), whose sum is σ = 7062528. Its totient is φ = 2196720.

The previous prime is 3989963. The next prime is 3989983. The reversal of 3989979 is 9799893.

It is a happy number.

It is not a de Polignac number, because 3989979 - 2⁴ = 3989963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989929) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17464 + ... + 17690.

Almost surely, 2^3989979 is an apocalyptic number.

3989979 is a deficient number, since it is larger than the sum of its proper divisors (3072549).

3989979 is a wasteful number, since it uses less digits than its factorization.

3989979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 268 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 3989979 is about 1997.4931789621. The cubic root of 3989979 is about 158.6074331266.

The spelling of 3989979 in words is "three million, nine hundred eighty-nine thousand, nine hundred seventy-nine".