3971979 has 24 divisors (see below), whose sum is σ = 6385392. Its totient is φ = 2358720.

The previous prime is 3971977. The next prime is 3971983. The reversal of 3971979 is 9791793.

It is not a de Polignac number, because 3971979 - 2¹ = 3971977 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4869 + ... + 5625.

It is an arithmetic number, because the mean of its divisors is an integer number (266058).

Almost surely, 2^3971979 is an apocalyptic number.

3971979 is a deficient number, since it is larger than the sum of its proper divisors (2413413).

3971979 is a wasteful number, since it uses less digits than its factorization.

3971979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 824 counting only the distinct ones).

The product of its digits is 107163, while the sum is 45.

The square root of 3971979 is about 1992.9824384575. The cubic root of 3971979 is about 158.3685648899.

It can be divided in two parts, 3971 and 979, that added together give a triangular number (4950 = T₉₉).

The spelling of 3971979 in words is "three million, nine hundred seventy-one thousand, nine hundred seventy-nine".