320170009 has 2 divisors, whose sum is σ = 320170010. Its totient is φ = 320170008.

The previous prime is 320169989. The next prime is 320170021. The reversal of 320170009 is 900071023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302864409 + 17305600 = 17403^2 + 4160^2 .

It is an emirp because it is prime and its reverse (900071023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320170009 - 2⁵ = 320169977 is a prime.

It is not a weakly prime, because it can be changed into another prime (320170309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160085004 + 160085005.

It is an arithmetic number, because the mean of its divisors is an integer number (160085005).

Almost surely, 2^320170009 is an apocalyptic number.

It is an amenable number.

320170009 is a deficient number, since it is larger than the sum of its proper divisors (1).

320170009 is an equidigital number, since it uses as much as digits as its factorization.

320170009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 320170009 is about 17893.2950850312. The cubic root of 320170009 is about 684.1114869345. Note that the first 3 decimals are identical.

The spelling of 320170009 in words is "three hundred twenty million, one hundred seventy thousand, nine".