9878213 has 4 divisors (see below), whose sum is σ = 9892320. Its totient is φ = 9864108.

The previous prime is 9878203. The next prime is 9878227. The reversal of 9878213 is 3128789.

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 a de Polignac number, because none of the positive numbers 2^k-9878213 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5945 + ... + 7422.

It is an arithmetic number, because the mean of its divisors is an integer number (2473080).

Almost surely, 2^9878213 is an apocalyptic number.

It is an amenable number.

9878213 is a deficient number, since it is larger than the sum of its proper divisors (14107).

9878213 is a wasteful number, since it uses less digits than its factorization.

9878213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14106.

The product of its digits is 24192, while the sum is 38.

The square root of 9878213 is about 3142.9624560278. The cubic root of 9878213 is about 214.5652871325.

The spelling of 9878213 in words is "nine million, eight hundred seventy-eight thousand, two hundred thirteen".