3981456687 has 16 divisors (see below), whose sum is σ = 5718480768. Its totient is φ = 2449476960.

The previous prime is 3981456683. The next prime is 3981456767. The reversal of 3981456687 is 7866541893.

It is not a de Polignac number, because 3981456687 - 2² = 3981456683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981456683) 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 in 15 ways as a sum of consecutive naturals, for example, 165112 + ... + 187682.

It is an arithmetic number, because the mean of its divisors is an integer number (357405048).

Almost surely, 2^3981456687 is an apocalyptic number.

3981456687 is a deficient number, since it is larger than the sum of its proper divisors (1737024081).

3981456687 is a wasteful number, since it uses less digits than its factorization.

3981456687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27110.

The product of its digits is 8709120, while the sum is 57.

The square root of 3981456687 is about 63098.7851467839. The cubic root of 3981456687 is about 1584.9442787750.

The spelling of 3981456687 in words is "three billion, nine hundred eighty-one million, four hundred fifty-six thousand, six hundred eighty-seven".