8213887 has 16 divisors (see below), whose sum is σ = 9302688. Its totient is φ = 7188480.

The previous prime is 8213879. The next prime is 8213893. The reversal of 8213887 is 7883128.

It is a cyclic number.

It is not a de Polignac number, because 8213887 - 2³ = 8213879 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 (8213897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42463 + ... + 42655.

It is an arithmetic number, because the mean of its divisors is an integer number (581418).

Almost surely, 2^8213887 is an apocalyptic number.

8213887 is a deficient number, since it is larger than the sum of its proper divisors (1088801).

8213887 is a wasteful number, since it uses less digits than its factorization.

8213887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its digits is 21504, while the sum is 37.

The square root of 8213887 is about 2865.9879622915. The cubic root of 8213887 is about 201.7667388800.

The spelling of 8213887 in words is "eight million, two hundred thirteen thousand, eight hundred eighty-seven".