240366409 has 2 divisors, whose sum is σ = 240366410. Its totient is φ = 240366408.

The previous prime is 240366403. The next prime is 240366457. The reversal of 240366409 is 904663042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190522809 + 49843600 = 13803^2 + 7060^2 .

It is a cyclic number.

It is not a de Polignac number, because 240366409 - 2⁵ = 240366377 is a prime.

It is not a weakly prime, because it can be changed into another prime (240366403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120183204 + 120183205.

It is an arithmetic number, because the mean of its divisors is an integer number (120183205).

Almost surely, 2^240366409 is an apocalyptic number.

It is an amenable number.

240366409 is a deficient number, since it is larger than the sum of its proper divisors (1).

240366409 is an equidigital number, since it uses as much as digits as its factorization.

240366409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 240366409 is about 15503.7546742716. The cubic root of 240366409 is about 621.7625953721.

The spelling of 240366409 in words is "two hundred forty million, three hundred sixty-six thousand, four hundred nine".