2928209 has 2 divisors, whose sum is σ = 2928210. Its totient is φ = 2928208.

The previous prime is 2928203. The next prime is 2928227. The reversal of 2928209 is 9028292.

2928209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2879809 + 48400 = 1697^2 + 220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2928209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2928203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1464104 + 1464105.

It is an arithmetic number, because the mean of its divisors is an integer number (1464105).

2^2928209 is an apocalyptic number.

It is an amenable number.

2928209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2928209 is an equidigital number, since it uses as much as digits as its factorization.

2928209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2928209 is about 1711.2010402054. The cubic root of 2928209 is about 143.0652057265.

The spelling of 2928209 in words is "two million, nine hundred twenty-eight thousand, two hundred nine".