3920872687 has 2 divisors, whose sum is σ = 3920872688. Its totient is φ = 3920872686.

The previous prime is 3920872649. The next prime is 3920872727. The reversal of 3920872687 is 7862780293.

3920872687 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 an emirp because it is prime and its reverse (7862780293) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3920872687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3920842687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960436343 + 1960436344.

It is an arithmetic number, because the mean of its divisors is an integer number (1960436344).

Almost surely, 2^3920872687 is an apocalyptic number.

3920872687 is a deficient number, since it is larger than the sum of its proper divisors (1).

3920872687 is an equidigital number, since it uses as much as digits as its factorization.

3920872687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 3920872687 is about 62616.8722230678. The cubic root of 3920872687 is about 1576.8640313064.

The spelling of 3920872687 in words is "three billion, nine hundred twenty million, eight hundred seventy-two thousand, six hundred eighty-seven".