3979943 has 8 divisors (see below), whose sum is σ = 4530816. Its totient is φ = 3460600.

The previous prime is 3979901. The next prime is 3979957. The reversal of 3979943 is 3499793.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3979943 - 2¹⁴ = 3963559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3979894 and 3979903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7613 + ... + 8118.

It is an arithmetic number, because the mean of its divisors is an integer number (566352).

Almost surely, 2^3979943 is an apocalyptic number.

3979943 is a deficient number, since it is larger than the sum of its proper divisors (550873).

3979943 is a wasteful number, since it uses less digits than its factorization.

3979943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15765.

The product of its digits is 183708, while the sum is 44.

The square root of 3979943 is about 1994.9794485157. The cubic root of 3979943 is about 158.4743396381.

The spelling of 3979943 in words is "three million, nine hundred seventy-nine thousand, nine hundred forty-three".