3987686587 has 4 divisors (see below), whose sum is σ = 4028796856. Its totient is φ = 3946576320.

The previous prime is 3987686569. The next prime is 3987686597. The reversal of 3987686587 is 7856867893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3987686587 - 2¹¹ = 3987684539 is a prime.

It is a super-2 number, since 2×3987686587² = 31803288632279417138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987686567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20554989 + ... + 20555182.

It is an arithmetic number, because the mean of its divisors is an integer number (1007199214).

Almost surely, 2^3987686587 is an apocalyptic number.

3987686587 is a deficient number, since it is larger than the sum of its proper divisors (41110269).

3987686587 is an equidigital number, since it uses as much as digits as its factorization.

3987686587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41110268.

The product of its digits is 121927680, while the sum is 67.

The square root of 3987686587 is about 63148.1320943066. The cubic root of 3987686587 is about 1585.7705173055.

The spelling of 3987686587 in words is "three billion, nine hundred eighty-seven million, six hundred eighty-six thousand, five hundred eighty-seven".