3961996777 has 2 divisors, whose sum is σ = 3961996778. Its totient is φ = 3961996776.

The previous prime is 3961996771. The next prime is 3961996837. The reversal of 3961996777 is 7776991693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2926701801 + 1035294976 = 54099^2 + 32176^2 .

It is a cyclic number.

It is not a de Polignac number, because 3961996777 - 2³ = 3961996769 is a prime.

It is not a weakly prime, because it can be changed into another prime (3961996771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980998388 + 1980998389.

It is an arithmetic number, because the mean of its divisors is an integer number (1980998389).

Almost surely, 2^3961996777 is an apocalyptic number.

It is an amenable number.

3961996777 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961996777 is an equidigital number, since it uses as much as digits as its factorization.

3961996777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27005076, while the sum is 64.

The square root of 3961996777 is about 62944.3943254679. The cubic root of 3961996777 is about 1582.3578502459.

The spelling of 3961996777 in words is "three billion, nine hundred sixty-one million, nine hundred ninety-six thousand, seven hundred seventy-seven".