3931566487 has 2 divisors, whose sum is σ = 3931566488. Its totient is φ = 3931566486.

The previous prime is 3931566473. The next prime is 3931566521. The reversal of 3931566487 is 7846651393.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3931566487 - 2¹⁵ = 3931533719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3931566407) 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, 1965783243 + 1965783244.

It is an arithmetic number, because the mean of its divisors is an integer number (1965783244).

Almost surely, 2^3931566487 is an apocalyptic number.

3931566487 is a deficient number, since it is larger than the sum of its proper divisors (1).

3931566487 is an equidigital number, since it uses as much as digits as its factorization.

3931566487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The square root of 3931566487 is about 62702.2048017452. The cubic root of 3931566487 is about 1578.2963111990.

The spelling of 3931566487 in words is "three billion, nine hundred thirty-one million, five hundred sixty-six thousand, four hundred eighty-seven".