3969463221 has 6 divisors (see below), whose sum is σ = 5733669110. Its totient is φ = 2646308808.

The previous prime is 3969463213. The next prime is 3969463271. The reversal of 3969463221 is 1223649693.

3969463221 is a `hidden beast` number, since 3 + 9 + 6 + 9 + 4 + 632 + 2 + 1 = 666.

3969463221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2410319025 + 1559144196 = 49095^2 + 39486^2 .

It is not a de Polignac number, because 3969463221 - 2³ = 3969463213 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 (3969463271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220525726 + ... + 220525743.

Almost surely, 2^3969463221 is an apocalyptic number.

It is an amenable number.

3969463221 is a deficient number, since it is larger than the sum of its proper divisors (1764205889).

3969463221 is a wasteful number, since it uses less digits than its factorization.

3969463221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441051475 (or 441051472 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 3969463221 is about 63003.6762498824. The cubic root of 3969463221 is about 1583.3512190876.

The spelling of 3969463221 in words is "three billion, nine hundred sixty-nine million, four hundred sixty-three thousand, two hundred twenty-one".