1318663009 has 2 divisors, whose sum is σ = 1318663010. Its totient is φ = 1318663008.

The previous prime is 1318663007. The next prime is 1318663013. The reversal of 1318663009 is 9003668131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760380625 + 558282384 = 27575^2 + 23628^2 .

It is an emirp because it is prime and its reverse (9003668131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318663009 - 2¹ = 1318663007 is a prime.

Together with 1318663007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1318663007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659331504 + 659331505.

It is an arithmetic number, because the mean of its divisors is an integer number (659331505).

Almost surely, 2^1318663009 is an apocalyptic number.

It is an amenable number.

1318663009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318663009 is an equidigital number, since it uses as much as digits as its factorization.

1318663009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1318663009 is about 36313.3998545991. The cubic root of 1318663009 is about 1096.5908249191.

The spelling of 1318663009 in words is "one billion, three hundred eighteen million, six hundred sixty-three thousand, nine".