3961394887 has 2 divisors, whose sum is σ = 3961394888. Its totient is φ = 3961394886.

The previous prime is 3961394863. The next prime is 3961394891. The reversal of 3961394887 is 7884931693.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3961394887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3961394807) 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, 1980697443 + 1980697444.

It is an arithmetic number, because the mean of its divisors is an integer number (1980697444).

Almost surely, 2^3961394887 is an apocalyptic number.

3961394887 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961394887 is an equidigital number, since it uses as much as digits as its factorization.

3961394887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 3961394887 is about 62939.6130191472. The cubic root of 3961394887 is about 1582.2777177898.

The spelling of 3961394887 in words is "three billion, nine hundred sixty-one million, three hundred ninety-four thousand, eight hundred eighty-seven".