3220309 has 2 divisors, whose sum is σ = 3220310. Its totient is φ = 3220308.

The previous prime is 3220307. The next prime is 3220319. The reversal of 3220309 is 9030223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2965284 + 255025 = 1722^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220309 - 2¹ = 3220307 is a prime.

Together with 3220307, it forms a pair of twin primes.

3220309 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3220307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610154 + 1610155.

It is an arithmetic number, because the mean of its divisors is an integer number (1610155).

Almost surely, 2^3220309 is an apocalyptic number.

It is an amenable number.

3220309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3220309 is an equidigital number, since it uses as much as digits as its factorization.

3220309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 3220309 is about 1794.5219419110. The cubic root of 3220309 is about 147.6723485718.

The spelling of 3220309 in words is "three million, two hundred twenty thousand, three hundred nine".