143423809 has 2 divisors, whose sum is σ = 143423810. Its totient is φ = 143423808.

The previous prime is 143423773. The next prime is 143423827. The reversal of 143423809 is 908324341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141681409 + 1742400 = 11903^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 143423809 - 2⁷ = 143423681 is a prime.

It is not a weakly prime, because it can be changed into another prime (143423309) 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, 71711904 + 71711905.

It is an arithmetic number, because the mean of its divisors is an integer number (71711905).

Almost surely, 2^143423809 is an apocalyptic number.

It is an amenable number.

143423809 is a deficient number, since it is larger than the sum of its proper divisors (1).

143423809 is an equidigital number, since it uses as much as digits as its factorization.

143423809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 143423809 is about 11975.9679775791. The cubic root of 143423809 is about 523.4482482129.

The spelling of 143423809 in words is "one hundred forty-three million, four hundred twenty-three thousand, eight hundred nine".