3987543609 has 81 divisors (see below), whose sum is σ = 6995374191. Its totient is φ = 2182360320.

The previous prime is 3987543583. The next prime is 3987543611. The reversal of 3987543609 is 9063457893.

The square root of 3987543609 is 63147.

It is a perfect power (a square), and thus also a powerful number.

3987543609 is a `hidden beast` number, since 3 + 98 + 7 + 543 + 6 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1790559225 + 2196984384 = 42315^2 + 46872^2 .

It is not a de Polignac number, because 3987543609 - 2⁵ = 3987543577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3987593609) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 41108649 + ... + 41108745.

Almost surely, 2^3987543609 is an apocalyptic number.

3987543609 is the 63147-th square number.

3987543609 is the 31574-th centered octagonal number.

It is an amenable number.

3987543609 is a deficient number, since it is larger than the sum of its proper divisors (3007830582).

3987543609 is an equidigital number, since it uses as much as digits as its factorization.

3987543609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The cubic root of 3987543609 is about 1585.7515645450.

The spelling of 3987543609 in words is "three billion, nine hundred eighty-seven million, five hundred forty-three thousand, six hundred nine".