320912069 has 2 divisors, whose sum is σ = 320912070. Its totient is φ = 320912068.

The previous prime is 320912041. The next prime is 320912083. The reversal of 320912069 is 960219023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298944100 + 21967969 = 17290^2 + 4687^2 .

It is an emirp because it is prime and its reverse (960219023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320912069 - 2⁸ = 320911813 is a prime.

It is a super-2 number, since 2×320912069² = 205969112059721522, 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 (320912089) 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, 160456034 + 160456035.

It is an arithmetic number, because the mean of its divisors is an integer number (160456035).

Almost surely, 2^320912069 is an apocalyptic number.

It is an amenable number.

320912069 is a deficient number, since it is larger than the sum of its proper divisors (1).

320912069 is an equidigital number, since it uses as much as digits as its factorization.

320912069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 320912069 is about 17914.0187841813. The cubic root of 320912069 is about 684.6396022733.

The spelling of 320912069 in words is "three hundred twenty million, nine hundred twelve thousand, sixty-nine".