3987983813 has 8 divisors (see below), whose sum is σ = 4353471360. Its totient is φ = 3622986880.

The previous prime is 3987983801. The next prime is 3987983821. The reversal of 3987983813 is 3183897893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3987983813 - 2⁸ = 3987983557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987983833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105548 + ... + 138261.

It is an arithmetic number, because the mean of its divisors is an integer number (544183920).

Almost surely, 2^3987983813 is an apocalyptic number.

It is an amenable number.

3987983813 is a deficient number, since it is larger than the sum of its proper divisors (365487547).

3987983813 is a wasteful number, since it uses less digits than its factorization.

3987983813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245307.

The product of its digits is 7838208, while the sum is 59.

The square root of 3987983813 is about 63150.4854533993. The cubic root of 3987983813 is about 1585.8099152963.

The spelling of 3987983813 in words is "three billion, nine hundred eighty-seven million, nine hundred eighty-three thousand, eight hundred thirteen".