320143009 has 2 divisors, whose sum is σ = 320143010. Its totient is φ = 320143008.

The previous prime is 320143001. The next prime is 320143013. The reversal of 320143009 is 900341023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206784400 + 113358609 = 14380^2 + 10647^2 .

It is a cyclic number.

It is not a de Polignac number, because 320143009 - 2³ = 320143001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320143001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160071504 + 160071505.

It is an arithmetic number, because the mean of its divisors is an integer number (160071505).

Almost surely, 2^320143009 is an apocalyptic number.

It is an amenable number.

320143009 is a deficient number, since it is larger than the sum of its proper divisors (1).

320143009 is an equidigital number, since it uses as much as digits as its factorization.

320143009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 320143009 is about 17892.5405965726. The cubic root of 320143009 is about 684.0922559750.

The spelling of 320143009 in words is "three hundred twenty million, one hundred forty-three thousand, nine".