1313144243209 has 2 divisors, whose sum is σ = 1313144243210. Its totient is φ = 1313144243208.

The previous prime is 1313144243197. The next prime is 1313144243219. The reversal of 1313144243209 is 9023424413131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 873097753609 + 440046489600 = 934397^2 + 663360^2 .

It is an emirp because it is prime and its reverse (9023424413131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313144243209 - 2¹³ = 1313144235017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313144243219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656572121604 + 656572121605.

It is an arithmetic number, because the mean of its divisors is an integer number (656572121605).

Almost surely, 2^{1313144243209} is an apocalyptic number.

It is an amenable number.

1313144243209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313144243209 is an equidigital number, since it uses as much as digits as its factorization.

1313144243209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 1313144243209 in words is "one trillion, three hundred thirteen billion, one hundred forty-four million, two hundred forty-three thousand, two hundred nine".