7243409 has 2 divisors, whose sum is σ = 7243410. Its totient is φ = 7243408.

The previous prime is 7243403. The next prime is 7243421. The reversal of 7243409 is 9043427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 61009 = 2680^2 + 247^2 .

It is an emirp because it is prime and its reverse (9043427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7243409 - 2⁸ = 7243153 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 (7243403) 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, 3621704 + 3621705.

It is an arithmetic number, because the mean of its divisors is an integer number (3621705).

Almost surely, 2^7243409 is an apocalyptic number.

It is an amenable number.

7243409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7243409 is an equidigital number, since it uses as much as digits as its factorization.

7243409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 7243409 is about 2691.3582072998. The cubic root of 7243409 is about 193.4851637943.

The spelling of 7243409 in words is "seven million, two hundred forty-three thousand, four hundred nine".