1240593889789 has 2 divisors, whose sum is σ = 1240593889790. Its totient is φ = 1240593889788.

The previous prime is 1240593889751. The next prime is 1240593889813. The reversal of 1240593889789 is 9879883950421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 854269487289 + 386324402500 = 924267^2 + 621550^2 .

It is an emirp because it is prime and its reverse (9879883950421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240593889789 - 2⁹ = 1240593889277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240593889729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620296944894 + 620296944895.

It is an arithmetic number, because the mean of its divisors is an integer number (620296944895).

Almost surely, 2^{1240593889789} is an apocalyptic number.

It is an amenable number.

1240593889789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240593889789 is an equidigital number, since it uses as much as digits as its factorization.

1240593889789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313528320, while the sum is 73.

The spelling of 1240593889789 in words is "one trillion, two hundred forty billion, five hundred ninety-three million, eight hundred eighty-nine thousand, seven hundred eighty-nine".