7404409 has 2 divisors, whose sum is σ = 7404410. Its totient is φ = 7404408.

The previous prime is 7404389. The next prime is 7404421. The reversal of 7404409 is 9044047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3888784 + 3515625 = 1972^2 + 1875^2 .

It is an emirp because it is prime and its reverse (9044047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7404409 - 2⁹ = 7403897 is a prime.

It is not a weakly prime, because it can be changed into another prime (7404499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3702204 + 3702205.

It is an arithmetic number, because the mean of its divisors is an integer number (3702205).

Almost surely, 2^7404409 is an apocalyptic number.

It is an amenable number.

7404409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7404409 is an equidigital number, since it uses as much as digits as its factorization.

7404409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 7404409 is about 2721.1043713904. The cubic root of 7404409 is about 194.9082101418.

The spelling of 7404409 in words is "seven million, four hundred four thousand, four hundred nine".