8220117 has 4 divisors (see below), whose sum is σ = 10960160. Its totient is φ = 5480076.

The previous prime is 8220109. The next prime is 8220139. The reversal of 8220117 is 7110228.

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 not a de Polignac number, because 8220117 - 2³ = 8220109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8220093 and 8220102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220517) 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, 1370017 + ... + 1370022.

It is an arithmetic number, because the mean of its divisors is an integer number (2740040).

Almost surely, 2^8220117 is an apocalyptic number.

It is an amenable number.

8220117 is a deficient number, since it is larger than the sum of its proper divisors (2740043).

8220117 is a wasteful number, since it uses less digits than its factorization.

8220117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740042.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 8220117 is about 2867.0746415118. The cubic root of 8220117 is about 201.8177374355.

The spelling of 8220117 in words is "eight million, two hundred twenty thousand, one hundred seventeen".