3966379 has 4 divisors (see below), whose sum is σ = 3971320. Its totient is φ = 3961440.

The previous prime is 3966349. The next prime is 3966407. The reversal of 3966379 is 9736693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9736693 = 103 ⋅94531.

It is a cyclic number.

It is not a de Polignac number, because 3966379 - 2¹⁹ = 3442091 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (3966329) 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, 957 + ... + 2974.

It is an arithmetic number, because the mean of its divisors is an integer number (992830).

Almost surely, 2^3966379 is an apocalyptic number.

3966379 is a deficient number, since it is larger than the sum of its proper divisors (4941).

3966379 is a wasteful number, since it uses less digits than its factorization.

3966379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940.

The product of its digits is 183708, while the sum is 43.

The square root of 3966379 is about 1991.5770133239. The cubic root of 3966379 is about 158.2941031770.

Subtracting from 3966379 its sum of digits (43), we obtain a triangular number (3966336 = T₂₈₁₆).

The spelling of 3966379 in words is "three million, nine hundred sixty-six thousand, three hundred seventy-nine".