1243140403613 has 2 divisors, whose sum is σ = 1243140403614. Its totient is φ = 1243140403612.

The previous prime is 1243140403597. The next prime is 1243140403639. The reversal of 1243140403613 is 3163040413421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 724102287364 + 519038116249 = 850942^2 + 720443^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243140403613 - 2⁴ = 1243140403597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1243140403613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243140403913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621570201806 + 621570201807.

It is an arithmetic number, because the mean of its divisors is an integer number (621570201807).

Almost surely, 2^{1243140403613} is an apocalyptic number.

It is an amenable number.

1243140403613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243140403613 is an equidigital number, since it uses as much as digits as its factorization.

1243140403613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 1243140403613 in words is "one trillion, two hundred forty-three billion, one hundred forty million, four hundred three thousand, six hundred thirteen".