3987963 has 18 divisors (see below), whose sum is σ = 6701604. Its totient is φ = 2278584.

The previous prime is 3987943. The next prime is 3988003. The reversal of 3987963 is 3697893.

It is a happy number.

It is not a de Polignac number, because 3987963 - 2⁵ = 3987931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3987913) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4081 + ... + 4962.

Almost surely, 2^3987963 is an apocalyptic number.

3987963 is a deficient number, since it is larger than the sum of its proper divisors (2713641).

3987963 is a wasteful number, since it uses less digits than its factorization.

3987963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9063 (or 9053 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3987963 is about 1996.9884826909. The cubic root of 3987963 is about 158.5807156549.

It can be divided in two parts, 3987 and 963, that added together give a triangular number (4950 = T₉₉).

The spelling of 3987963 in words is "three million, nine hundred eighty-seven thousand, nine hundred sixty-three".