1290735943493 has 2 divisors, whose sum is σ = 1290735943494. Its totient is φ = 1290735943492.

The previous prime is 1290735943487. The next prime is 1290735943537. The reversal of 1290735943493 is 3943495370921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 942543897409 + 348192046084 = 970847^2 + 590078^2 .

It is an emirp because it is prime and its reverse (3943495370921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1290735943493 - 2¹⁸ = 1290735681349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290735943463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645367971746 + 645367971747.

It is an arithmetic number, because the mean of its divisors is an integer number (645367971747).

Almost surely, 2^{1290735943493} is an apocalyptic number.

It is an amenable number.

1290735943493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290735943493 is an equidigital number, since it uses as much as digits as its factorization.

1290735943493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22044960, while the sum is 59.

The spelling of 1290735943493 in words is "one trillion, two hundred ninety billion, seven hundred thirty-five million, nine hundred forty-three thousand, four hundred ninety-three".