7220849 has 2 divisors, whose sum is σ = 7220850. Its totient is φ = 7220848.

The previous prime is 7220821. The next prime is 7220867. The reversal of 7220849 is 9480227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4840000 + 2380849 = 2200^2 + 1543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7220849 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 (7220149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610424 + 3610425.

It is an arithmetic number, because the mean of its divisors is an integer number (3610425).

Almost surely, 2^7220849 is an apocalyptic number.

It is an amenable number.

7220849 is a deficient number, since it is larger than the sum of its proper divisors (1).

7220849 is an equidigital number, since it uses as much as digits as its factorization.

7220849 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 7220849 is about 2687.1637464062. The cubic root of 7220849 is about 193.2840814559.

The spelling of 7220849 in words is "seven million, two hundred twenty thousand, eight hundred forty-nine".