3943164789 has 6 divisors (see below), whose sum is σ = 5695682486. Its totient is φ = 2628776520.

The previous prime is 3943164787. The next prime is 3943164803. The reversal of 3943164789 is 9874613493.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2958272100 + 984892689 = 54390^2 + 31383^2 .

It is not a de Polignac number, because 3943164789 - 2¹ = 3943164787 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 (3943164787) 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, 219064702 + ... + 219064719.

Almost surely, 2^3943164789 is an apocalyptic number.

It is an amenable number.

3943164789 is a deficient number, since it is larger than the sum of its proper divisors (1752517697).

3943164789 is a wasteful number, since it uses less digits than its factorization.

3943164789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438129427 (or 438129424 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 3943164789 is about 62794.6238861258. The cubic root of 3943164789 is about 1579.8468030977.

The spelling of 3943164789 in words is "three billion, nine hundred forty-three million, one hundred sixty-four thousand, seven hundred eighty-nine".