3946773221 has 8 divisors (see below), whose sum is σ = 4032218304. Its totient is φ = 3862108800.

The previous prime is 3946773197. The next prime is 3946773247. The reversal of 3946773221 is 1223776493.

3946773221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3946773221 - 2¹⁴ = 3946756837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946776221) 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, 184940 + ... + 205173.

It is an arithmetic number, because the mean of its divisors is an integer number (504027288).

Almost surely, 2^3946773221 is an apocalyptic number.

It is an amenable number.

3946773221 is a deficient number, since it is larger than the sum of its proper divisors (85445083).

3946773221 is a wasteful number, since it uses less digits than its factorization.

3946773221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390331.

The product of its digits is 381024, while the sum is 44.

The square root of 3946773221 is about 62823.3493296879. The cubic root of 3946773221 is about 1580.3285677041.

The spelling of 3946773221 in words is "three billion, nine hundred forty-six million, seven hundred seventy-three thousand, two hundred twenty-one".