143223809 has 2 divisors, whose sum is σ = 143223810. Its totient is φ = 143223808.

The previous prime is 143223727. The next prime is 143223851. The reversal of 143223809 is 908322341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84364225 + 58859584 = 9185^2 + 7672^2 .

It is a cyclic number.

It is not a de Polignac number, because 143223809 - 2¹⁶ = 143158273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143223889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71611904 + 71611905.

It is an arithmetic number, because the mean of its divisors is an integer number (71611905).

Almost surely, 2^143223809 is an apocalyptic number.

It is an amenable number.

143223809 is a deficient number, since it is larger than the sum of its proper divisors (1).

143223809 is an equidigital number, since it uses as much as digits as its factorization.

143223809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 143223809 is about 11967.6150088478. The cubic root of 143223809 is about 523.2048243113.

The spelling of 143223809 in words is "one hundred forty-three million, two hundred twenty-three thousand, eight hundred nine".