240788609 has 2 divisors, whose sum is σ = 240788610. Its totient is φ = 240788608.

The previous prime is 240788599. The next prime is 240788623. The reversal of 240788609 is 906887042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235162225 + 5626384 = 15335^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 240788609 - 2²⁴ = 224011393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240788609.

It is not a weakly prime, because it can be changed into another prime (240788659) 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, 120394304 + 120394305.

It is an arithmetic number, because the mean of its divisors is an integer number (120394305).

Almost surely, 2^240788609 is an apocalyptic number.

It is an amenable number.

240788609 is a deficient number, since it is larger than the sum of its proper divisors (1).

240788609 is an equidigital number, since it uses as much as digits as its factorization.

240788609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 240788609 is about 15517.3647569425. The cubic root of 240788609 is about 622.1264213347.

The spelling of 240788609 in words is "two hundred forty million, seven hundred eighty-eight thousand, six hundred nine".