143128709 has 2 divisors, whose sum is σ = 143128710. Its totient is φ = 143128708.

The previous prime is 143128681. The next prime is 143128723. The reversal of 143128709 is 907821341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109139809 + 33988900 = 10447^2 + 5830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143128709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143128309) 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, 71564354 + 71564355.

It is an arithmetic number, because the mean of its divisors is an integer number (71564355).

Almost surely, 2^143128709 is an apocalyptic number.

It is an amenable number.

143128709 is a deficient number, since it is larger than the sum of its proper divisors (1).

143128709 is an equidigital number, since it uses as much as digits as its factorization.

143128709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 143128709 is about 11963.6411263461. The cubic root of 143128709 is about 523.0889967452.

The spelling of 143128709 in words is "one hundred forty-three million, one hundred twenty-eight thousand, seven hundred nine".