3216289 has 2 divisors, whose sum is σ = 3216290. Its totient is φ = 3216288.

The previous prime is 3216287. The next prime is 3216331. The reversal of 3216289 is 9826123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2250000 + 966289 = 1500^2 + 983^2 .

It is an emirp because it is prime and its reverse (9826123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3216289 - 2¹ = 3216287 is a prime.

Together with 3216287, it forms a pair of twin primes.

3216289 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3216289.

It is not a weakly prime, because it can be changed into another prime (3216287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608144 + 1608145.

It is an arithmetic number, because the mean of its divisors is an integer number (1608145).

Almost surely, 2^3216289 is an apocalyptic number.

It is an amenable number.

3216289 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216289 is an equidigital number, since it uses as much as digits as its factorization.

3216289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 3216289 is about 1793.4015166716. The cubic root of 3216289 is about 147.6108751715.

The spelling of 3216289 in words is "three million, two hundred sixteen thousand, two hundred eighty-nine".