3987553 has 4 divisors (see below), whose sum is σ = 3991600. Its totient is φ = 3983508.

The previous prime is 3987551. The next prime is 3987559. The reversal of 3987553 is 3557893.

It is a happy number.

3987553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3557893 = 23 ⋅154691.

It is a cyclic number.

It is not a de Polignac number, because 3987553 - 2¹ = 3987551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526 + ... + 2872.

It is an arithmetic number, because the mean of its divisors is an integer number (997900).

Almost surely, 2^3987553 is an apocalyptic number.

It is an amenable number.

3987553 is a deficient number, since it is larger than the sum of its proper divisors (4047).

3987553 is a wasteful number, since it uses less digits than its factorization.

3987553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046.

The product of its digits is 113400, while the sum is 40.

The square root of 3987553 is about 1996.8858254793. The cubic root of 3987553 is about 158.5752809403.

The spelling of 3987553 in words is "three million, nine hundred eighty-seven thousand, five hundred fifty-three".