3961996837 has 2 divisors, whose sum is σ = 3961996838. Its totient is φ = 3961996836.

The previous prime is 3961996777. The next prime is 3961996853. The reversal of 3961996837 is 7386991693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2980177281 + 981819556 = 54591^2 + 31334^2 .

It is an emirp because it is prime and its reverse (7386991693) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3961996837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3961991837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980998418 + 1980998419.

It is an arithmetic number, because the mean of its divisors is an integer number (1980998419).

Almost surely, 2^3961996837 is an apocalyptic number.

It is an amenable number.

3961996837 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961996837 is an equidigital number, since it uses as much as digits as its factorization.

3961996837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 61.

The square root of 3961996837 is about 62944.3948020791. The cubic root of 3961996837 is about 1582.3578582336.

The spelling of 3961996837 in words is "three billion, nine hundred sixty-one million, nine hundred ninety-six thousand, eight hundred thirty-seven".