320748269 has 2 divisors, whose sum is σ = 320748270. Its totient is φ = 320748268.

The previous prime is 320748247. The next prime is 320748341. The reversal of 320748269 is 962847023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284327044 + 36421225 = 16862^2 + 6035^2 .

It is a cyclic number.

It is not a de Polignac number, because 320748269 - 2¹² = 320744173 is a prime.

It is a super-2 number, since 2×320748269² = 205758904132992722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320748569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160374134 + 160374135.

It is an arithmetic number, because the mean of its divisors is an integer number (160374135).

Almost surely, 2^320748269 is an apocalyptic number.

It is an amenable number.

320748269 is a deficient number, since it is larger than the sum of its proper divisors (1).

320748269 is an equidigital number, since it uses as much as digits as its factorization.

320748269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 320748269 is about 17909.4463621855. The cubic root of 320748269 is about 684.5230978231.

The spelling of 320748269 in words is "three hundred twenty million, seven hundred forty-eight thousand, two hundred sixty-nine".