240863809 has 2 divisors, whose sum is σ = 240863810. Its totient is φ = 240863808.

The previous prime is 240863801. The next prime is 240863849. The reversal of 240863809 is 908368042.

It is an a-pointer prime, because the next prime (240863849) can be obtained adding 240863809 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220433409 + 20430400 = 14847^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 240863809 - 2³ = 240863801 is a prime.

It is not a weakly prime, because it can be changed into another prime (240863801) 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, 120431904 + 120431905.

It is an arithmetic number, because the mean of its divisors is an integer number (120431905).

Almost surely, 2^240863809 is an apocalyptic number.

It is an amenable number.

240863809 is a deficient number, since it is larger than the sum of its proper divisors (1).

240863809 is an equidigital number, since it uses as much as digits as its factorization.

240863809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 240863809 is about 15519.7876596299. The cubic root of 240863809 is about 622.1911794332.

The spelling of 240863809 in words is "two hundred forty million, eight hundred sixty-three thousand, eight hundred nine".