8340209 has 4 divisors (see below), whose sum is σ = 8609280. Its totient is φ = 8071140.

The previous prime is 8340187. The next prime is 8340223. The reversal of 8340209 is 9020438.

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 8340209 - 2¹² = 8336113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8340509) 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, 134489 + ... + 134550.

It is an arithmetic number, because the mean of its divisors is an integer number (2152320).

Almost surely, 2^8340209 is an apocalyptic number.

It is an amenable number.

8340209 is a deficient number, since it is larger than the sum of its proper divisors (269071).

8340209 is a wasteful number, since it uses less digits than its factorization.

8340209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269070.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 8340209 is about 2887.9420008026. The cubic root of 8340209 is about 202.7958101156.

The spelling of 8340209 in words is "eight million, three hundred forty thousand, two hundred nine".