320808069 has 6 divisors (see below), whose sum is σ = 463389446. Its totient is φ = 213872040.

The previous prime is 320808011. The next prime is 320808091. The reversal of 320808069 is 960808023.

It can be written as a sum of positive squares in only one way, i.e., 299739969 + 21068100 = 17313^2 + 4590^2 .

It is not a de Polignac number, because 320808069 - 2⁷ = 320807941 is a prime.

It is a super-2 number, since 2×320808069² = 205835634271017522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320808269) 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 in 5 ways as a sum of consecutive naturals, for example, 17822662 + ... + 17822679.

Almost surely, 2^320808069 is an apocalyptic number.

It is an amenable number.

320808069 is a deficient number, since it is larger than the sum of its proper divisors (142581377).

320808069 is a wasteful number, since it uses less digits than its factorization.

320808069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35645347 (or 35645344 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 320808069 is about 17911.1157943887. The cubic root of 320808069 is about 684.5656357898.

The spelling of 320808069 in words is "three hundred twenty million, eight hundred eight thousand, sixty-nine".