1313724118649 has 2 divisors, whose sum is σ = 1313724118650. Its totient is φ = 1313724118648.

The previous prime is 1313724118639. The next prime is 1313724118667. The reversal of 1313724118649 is 9468114273131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 988966603024 + 324757515625 = 994468^2 + 569875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313724118649 - 2²⁴ = 1313707341433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1313724118597 and 1313724118606.

It is not a weakly prime, because it can be changed into another prime (1313724118639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656862059324 + 656862059325.

It is an arithmetic number, because the mean of its divisors is an integer number (656862059325).

Almost surely, 2^{1313724118649} is an apocalyptic number.

It is an amenable number.

1313724118649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313724118649 is an equidigital number, since it uses as much as digits as its factorization.

1313724118649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The spelling of 1313724118649 in words is "one trillion, three hundred thirteen billion, seven hundred twenty-four million, one hundred eighteen thousand, six hundred forty-nine".