240778589 has 2 divisors, whose sum is σ = 240778590. Its totient is φ = 240778588.

The previous prime is 240778567. The next prime is 240778597. The reversal of 240778589 is 985877042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227014489 + 13764100 = 15067^2 + 3710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240778589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240772589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120389294 + 120389295.

It is an arithmetic number, because the mean of its divisors is an integer number (120389295).

Almost surely, 2^240778589 is an apocalyptic number.

It is an amenable number.

240778589 is a deficient number, since it is larger than the sum of its proper divisors (1).

240778589 is an equidigital number, since it uses as much as digits as its factorization.

240778589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 240778589 is about 15517.0418894840. The cubic root of 240778589 is about 622.1177916446.

The spelling of 240778589 in words is "two hundred forty million, seven hundred seventy-eight thousand, five hundred eighty-nine".