3887813 has 4 divisors (see below), whose sum is σ = 3904320. Its totient is φ = 3871308.

The previous prime is 3887789. The next prime is 3887831. The reversal of 3887813 is 3187883.

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.

It is a cyclic number.

It is not a de Polignac number, because 3887813 - 2⁶ = 3887749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3887843) 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, 7895 + ... + 8372.

It is an arithmetic number, because the mean of its divisors is an integer number (976080).

Almost surely, 2^3887813 is an apocalyptic number.

It is an amenable number.

3887813 is a deficient number, since it is larger than the sum of its proper divisors (16507).

3887813 is a wasteful number, since it uses less digits than its factorization.

3887813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16506.

The product of its digits is 32256, while the sum is 38.

The square root of 3887813 is about 1971.7537878751. The cubic root of 3887813 is about 157.2419626315.

The spelling of 3887813 in words is "three million, eight hundred eighty-seven thousand, eight hundred thirteen".