8138217 has 8 divisors (see below), whose sum is σ = 10869696. Its totient is φ = 5416112.

The previous prime is 8138209. The next prime is 8138219. The reversal of 8138217 is 7128318.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8138217 - 2³ = 8138209 is a prime.

8138217 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8138219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28 + ... + 4034.

It is an arithmetic number, because the mean of its divisors is an integer number (1358712).

Almost surely, 2^8138217 is an apocalyptic number.

It is an amenable number.

8138217 is a deficient number, since it is larger than the sum of its proper divisors (2731479).

8138217 is a wasteful number, since it uses less digits than its factorization.

8138217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687.

The product of its digits is 2688, while the sum is 30.

The square root of 8138217 is about 2852.7560358362. The cubic root of 8138217 is about 201.1452379662.

The spelling of 8138217 in words is "eight million, one hundred thirty-eight thousand, two hundred seventeen".