3943131966 has 12 divisors (see below), whose sum is σ = 8543452632. Its totient is φ = 1314377316.

The previous prime is 3943131961. The next prime is 3943131979. The reversal of 3943131966 is 6691313493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943131961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109531426 + ... + 109531461.

It is an arithmetic number, because the mean of its divisors is an integer number (711954386).

Almost surely, 2^3943131966 is an apocalyptic number.

3943131966 is an abundant number, since it is smaller than the sum of its proper divisors (4600320666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3943131966 is a wasteful number, since it uses less digits than its factorization.

3943131966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219062895 (or 219062892 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 3943131966 is about 62794.3625335905. The cubic root of 3943131966 is about 1579.8424195244.

The spelling of 3943131966 in words is "three billion, nine hundred forty-three million, one hundred thirty-one thousand, nine hundred sixty-six".