320441309 has 2 divisors, whose sum is σ = 320441310. Its totient is φ = 320441308.

The previous prime is 320441293. The next prime is 320441321. The reversal of 320441309 is 903144023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291658084 + 28783225 = 17078^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 320441309 - 2⁴ = 320441293 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 (320441399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160220654 + 160220655.

It is an arithmetic number, because the mean of its divisors is an integer number (160220655).

Almost surely, 2^320441309 is an apocalyptic number.

It is an amenable number.

320441309 is a deficient number, since it is larger than the sum of its proper divisors (1).

320441309 is an equidigital number, since it uses as much as digits as its factorization.

320441309 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 26.

The square root of 320441309 is about 17900.8745317093. The cubic root of 320441309 is about 684.3046624792.

The spelling of 320441309 in words is "three hundred twenty million, four hundred forty-one thousand, three hundred nine".