3218009 has 2 divisors, whose sum is σ = 3218010. Its totient is φ = 3218008.

The previous prime is 3218003. The next prime is 3218027. The reversal of 3218009 is 9008123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3097600 + 120409 = 1760^2 + 347^2 .

It is an emirp because it is prime and its reverse (9008123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3218009 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3218003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609004 + 1609005.

It is an arithmetic number, because the mean of its divisors is an integer number (1609005).

Almost surely, 2^3218009 is an apocalyptic number.

It is an amenable number.

3218009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3218009 is an equidigital number, since it uses as much as digits as its factorization.

3218009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 3218009 is about 1793.8809882487. The cubic root of 3218009 is about 147.6371834894.

The spelling of 3218009 in words is "three million, two hundred eighteen thousand, nine".