7224809 has 2 divisors, whose sum is σ = 7224810. Its totient is φ = 7224808.

The previous prime is 7224773. The next prime is 7224823. The reversal of 7224809 is 9084227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4853209 + 2371600 = 2203^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 7224809 - 2¹² = 7220713 is a prime.

It is not a weakly prime, because it can be changed into another prime (7224839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3612404 + 3612405.

It is an arithmetic number, because the mean of its divisors is an integer number (3612405).

Almost surely, 2^7224809 is an apocalyptic number.

It is an amenable number.

7224809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7224809 is an equidigital number, since it uses as much as digits as its factorization.

7224809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 7224809 is about 2687.9004817887. The cubic root of 7224809 is about 193.3194081000.

The spelling of 7224809 in words is "seven million, two hundred twenty-four thousand, eight hundred nine".