320510009 has 2 divisors, whose sum is σ = 320510010. Its totient is φ = 320510008.

The previous prime is 320509999. The next prime is 320510011. The reversal of 320510009 is 900015023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206554384 + 113955625 = 14372^2 + 10675^2 .

It is an emirp because it is prime and its reverse (900015023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320510009 - 2¹⁶ = 320444473 is a prime.

It is a Sophie Germain prime.

Together with 320510011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (320510609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160255004 + 160255005.

It is an arithmetic number, because the mean of its divisors is an integer number (160255005).

Almost surely, 2^320510009 is an apocalyptic number.

It is an amenable number.

320510009 is a deficient number, since it is larger than the sum of its proper divisors (1).

320510009 is an equidigital number, since it uses as much as digits as its factorization.

320510009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 320510009 is about 17902.7933295338. The cubic root of 320510009 is about 684.3535620954.

The spelling of 320510009 in words is "three hundred twenty million, five hundred ten thousand, nine".