320201309 has 2 divisors, whose sum is σ = 320201310. Its totient is φ = 320201308.

The previous prime is 320201303. The next prime is 320201317. The reversal of 320201309 is 903102023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228463225 + 91738084 = 15115^2 + 9578^2 .

It is an emirp because it is prime and its reverse (903102023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320201309 - 2¹⁶ = 320135773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320201303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160100654 + 160100655.

It is an arithmetic number, because the mean of its divisors is an integer number (160100655).

Almost surely, 2^320201309 is an apocalyptic number.

It is an amenable number.

320201309 is a deficient number, since it is larger than the sum of its proper divisors (1).

320201309 is an equidigital number, since it uses as much as digits as its factorization.

320201309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 320201309 is about 17894.1696929475. The cubic root of 320201309 is about 684.1337792492.

The spelling of 320201309 in words is "three hundred twenty million, two hundred one thousand, three hundred nine".