8221867 has 4 divisors (see below), whose sum is σ = 8232840. Its totient is φ = 8210896.

The previous prime is 8221859. The next prime is 8221891. The reversal of 8221867 is 7681228.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8221867 - 2³ = 8221859 is a prime.

It is a Duffinian number.

8221867 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8221847) 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, 4273 + ... + 5890.

It is an arithmetic number, because the mean of its divisors is an integer number (2058210).

Almost surely, 2^8221867 is an apocalyptic number.

8221867 is a deficient number, since it is larger than the sum of its proper divisors (10973).

8221867 is a wasteful number, since it uses less digits than its factorization.

8221867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10972.

The product of its digits is 10752, while the sum is 34.

The square root of 8221867 is about 2867.3798143950. The cubic root of 8221867 is about 201.8320582365.

The spelling of 8221867 in words is "eight million, two hundred twenty-one thousand, eight hundred sixty-seven".