320132809 has 2 divisors, whose sum is σ = 320132810. Its totient is φ = 320132808.

The previous prime is 320132803. The next prime is 320132849. The reversal of 320132809 is 908231023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317837584 + 2295225 = 17828^2 + 1515^2 .

It is a cyclic number.

It is not a de Polignac number, because 320132809 - 2³ = 320132801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320132801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160066404 + 160066405.

It is an arithmetic number, because the mean of its divisors is an integer number (160066405).

Almost surely, 2^320132809 is an apocalyptic number.

It is an amenable number.

320132809 is a deficient number, since it is larger than the sum of its proper divisors (1).

320132809 is an equidigital number, since it uses as much as digits as its factorization.

320132809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 320132809 is about 17892.2555593195. The cubic root of 320132809 is about 684.0849906645.

The spelling of 320132809 in words is "three hundred twenty million, one hundred thirty-two thousand, eight hundred nine".