1320320269 has 2 divisors, whose sum is σ = 1320320270. Its totient is φ = 1320320268.

The previous prime is 1320320233. The next prime is 1320320327. The reversal of 1320320269 is 9620230231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1242210025 + 78110244 = 35245^2 + 8838^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320320269 - 2⁹ = 1320319757 is a prime.

It is a super-2 number, since 2×1320320269² = 3486491225464464722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320320069) 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, 660160134 + 660160135.

It is an arithmetic number, because the mean of its divisors is an integer number (660160135).

Almost surely, 2^1320320269 is an apocalyptic number.

It is an amenable number.

1320320269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320320269 is an equidigital number, since it uses as much as digits as its factorization.

1320320269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1320320269 is about 36336.2115389043. The cubic root of 1320320269 is about 1097.0500211664.

The spelling of 1320320269 in words is "one billion, three hundred twenty million, three hundred twenty thousand, two hundred sixty-nine".