3961681907 has 2 divisors, whose sum is σ = 3961681908. Its totient is φ = 3961681906.

The previous prime is 3961681903. The next prime is 3961681931. The reversal of 3961681907 is 7091861693.

3961681907 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3961681907 - 2² = 3961681903 is a prime.

It is not a weakly prime, because it can be changed into another prime (3961681901) 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 as a sum of consecutive naturals, namely, 1980840953 + 1980840954.

It is an arithmetic number, because the mean of its divisors is an integer number (1980840954).

Almost surely, 2^3961681907 is an apocalyptic number.

3961681907 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961681907 is an equidigital number, since it uses as much as digits as its factorization.

3961681907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 3961681907 is about 62941.8930999060. The cubic root of 3961681907 is about 1582.3159311292.

The spelling of 3961681907 in words is "three billion, nine hundred sixty-one million, six hundred eighty-one thousand, nine hundred seven".