1350505309 has 2 divisors, whose sum is σ = 1350505310. Its totient is φ = 1350505308.

The previous prime is 1350505307. The next prime is 1350505319. The reversal of 1350505309 is 9035050531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903182809 + 447322500 = 30053^2 + 21150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1350505309 - 2¹ = 1350505307 is a prime.

Together with 1350505307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1350505301) 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, 675252654 + 675252655.

It is an arithmetic number, because the mean of its divisors is an integer number (675252655).

Almost surely, 2^1350505309 is an apocalyptic number.

It is an amenable number.

1350505309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1350505309 is an equidigital number, since it uses as much as digits as its factorization.

1350505309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 1350505309 is about 36749.2218829188. The cubic root of 1350505309 is about 1105.3473267815.

The spelling of 1350505309 in words is "one billion, three hundred fifty million, five hundred five thousand, three hundred nine".