320065601 has 2 divisors, whose sum is σ = 320065602. Its totient is φ = 320065600.

The previous prime is 320065591. The next prime is 320065643. The reversal of 320065601 is 106560023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259210000 + 60855601 = 16100^2 + 7801^2 .

It is an emirp because it is prime and its reverse (106560023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320065601 - 2¹⁸ = 319803457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (320065661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160032800 + 160032801.

It is an arithmetic number, because the mean of its divisors is an integer number (160032801).

Almost surely, 2^320065601 is an apocalyptic number.

It is an amenable number.

320065601 is a deficient number, since it is larger than the sum of its proper divisors (1).

320065601 is an equidigital number, since it uses as much as digits as its factorization.

320065601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 320065601 is about 17890.3773297267. The cubic root of 320065601 is about 684.0371155321.

The spelling of 320065601 in words is "three hundred twenty million, sixty-five thousand, six hundred one".