3943966969777 has 16 divisors (see below), whose sum is σ = 3978782325760. Its totient is φ = 3909294727632.

The previous prime is 3943966969763. The next prime is 3943966969807. The reversal of 3943966969777 is 7779696693493.

It is a cyclic number.

It is not a de Polignac number, because 3943966969777 - 2²³ = 3943958581169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3943966969694 and 3943966969703.

It is not an unprimeable number, because it can be changed into a prime (3943966969277) 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 15 ways as a sum of consecutive naturals, for example, 97547188 + ... + 97587610.

It is an arithmetic number, because the mean of its divisors is an integer number (248673895360).

Almost surely, 2^{3943966969777} is an apocalyptic number.

It is an amenable number.

3943966969777 is a deficient number, since it is larger than the sum of its proper divisors (34815355983).

3943966969777 is a wasteful number, since it uses less digits than its factorization.

3943966969777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42172.

The product of its digits is 17499289248, while the sum is 85.

The spelling of 3943966969777 in words is "three trillion, nine hundred forty-three billion, nine hundred sixty-six million, nine hundred sixty-nine thousand, seven hundred seventy-seven".