9240409 has 2 divisors, whose sum is σ = 9240410. Its totient is φ = 9240408.

The previous prime is 9240383. The next prime is 9240421. The reversal of 9240409 is 9040429.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 3504384 = 2395^2 + 1872^2 .

It is an emirp because it is prime and its reverse (9040429) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9240409 - 2⁵ = 9240377 is a prime.

It is not a weakly prime, because it can be changed into another prime (9240509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4620204 + 4620205.

It is an arithmetic number, because the mean of its divisors is an integer number (4620205).

Almost surely, 2^9240409 is an apocalyptic number.

It is an amenable number.

9240409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9240409 is an equidigital number, since it uses as much as digits as its factorization.

9240409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 9240409 is about 3039.8041055305. The cubic root of 9240409 is about 209.8442458078.

The spelling of 9240409 in words is "nine million, two hundred forty thousand, four hundred nine".