3979221 has 8 divisors (see below), whose sum is σ = 5316864. Its totient is φ = 2647200.

The previous prime is 3979219. The next prime is 3979229. The reversal of 3979221 is 1229793.

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

It is not a de Polignac number, because 3979221 - 2¹ = 3979219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979229) 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, 700 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (664608).

Almost surely, 2^3979221 is an apocalyptic number.

It is an amenable number.

3979221 is a deficient number, since it is larger than the sum of its proper divisors (1337643).

3979221 is a wasteful number, since it uses less digits than its factorization.

3979221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811.

The product of its digits is 6804, while the sum is 33.

The square root of 3979221 is about 1994.7984860632. The cubic root of 3979221 is about 158.4647561346.

The spelling of 3979221 in words is "three million, nine hundred seventy-nine thousand, two hundred twenty-one".