143240789 has 2 divisors, whose sum is σ = 143240790. Its totient is φ = 143240788.

The previous prime is 143240777. The next prime is 143240807. The reversal of 143240789 is 987042341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141372100 + 1868689 = 11890^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 143240789 - 2⁸ = 143240533 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 (143240719) 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, 71620394 + 71620395.

It is an arithmetic number, because the mean of its divisors is an integer number (71620395).

Almost surely, 2^143240789 is an apocalyptic number.

It is an amenable number.

143240789 is a deficient number, since it is larger than the sum of its proper divisors (1).

143240789 is an equidigital number, since it uses as much as digits as its factorization.

143240789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 143240789 is about 11968.3244023547. The cubic root of 143240789 is about 523.2254998003.

The spelling of 143240789 in words is "one hundred forty-three million, two hundred forty thousand, seven hundred eighty-nine".