320869709 has 2 divisors, whose sum is σ = 320869710. Its totient is φ = 320869708.

The previous prime is 320869669. The next prime is 320869727. The reversal of 320869709 is 907968023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286354084 + 34515625 = 16922^2 + 5875^2 .

It is a cyclic number.

It is not a de Polignac number, because 320869709 - 2²⁴ = 304092493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320869709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320869729) 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, 160434854 + 160434855.

It is an arithmetic number, because the mean of its divisors is an integer number (160434855).

Almost surely, 2^320869709 is an apocalyptic number.

It is an amenable number.

320869709 is a deficient number, since it is larger than the sum of its proper divisors (1).

320869709 is an equidigital number, since it uses as much as digits as its factorization.

320869709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 320869709 is about 17912.8364308950. The cubic root of 320869709 is about 684.6094770848.

The spelling of 320869709 in words is "three hundred twenty million, eight hundred sixty-nine thousand, seven hundred nine".