320005109 has 2 divisors, whose sum is σ = 320005110. Its totient is φ = 320005108.

The previous prime is 320005069. The next prime is 320005117. The reversal of 320005109 is 901500023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317374225 + 2630884 = 17815^2 + 1622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320005109 is a prime.

It is a super-2 number, since 2×320005109² = 204806539572203762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320005129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160002554 + 160002555.

It is an arithmetic number, because the mean of its divisors is an integer number (160002555).

Almost surely, 2^320005109 is an apocalyptic number.

It is an amenable number.

320005109 is a deficient number, since it is larger than the sum of its proper divisors (1).

320005109 is an equidigital number, since it uses as much as digits as its factorization.

320005109 is an evil number, because the sum of its binary digits is even.

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

The square root of 320005109 is about 17888.6866203196. The cubic root of 320005109 is about 683.9940187626.

The spelling of 320005109 in words is "three hundred twenty million, five thousand, one hundred nine".