8222809 has 4 divisors (see below), whose sum is σ = 9397504. Its totient is φ = 7048116.

The previous prime is 8222807. The next prime is 8222813. The reversal of 8222809 is 9082228.

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 8222809 - 2¹ = 8222807 is a prime.

It is a super-2 number, since 2×8222809² = 135229175700962, which contains 22 as substring.

It is a Duffinian number.

8222809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8222807) 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, 587337 + ... + 587350.

It is an arithmetic number, because the mean of its divisors is an integer number (2349376).

Almost surely, 2^8222809 is an apocalyptic number.

It is an amenable number.

8222809 is a deficient number, since it is larger than the sum of its proper divisors (1174695).

8222809 is a wasteful number, since it uses less digits than its factorization.

8222809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174694.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 8222809 is about 2867.5440711522. The cubic root of 8222809 is about 201.8397660778.

The spelling of 8222809 in words is "eight million, two hundred twenty-two thousand, eight hundred nine".