1243433321359 has 2 divisors, whose sum is σ = 1243433321360. Its totient is φ = 1243433321358.

The previous prime is 1243433321287. The next prime is 1243433321411. The reversal of 1243433321359 is 9531233343421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243433321359 - 2¹¹ = 1243433319311 is a prime.

It is a super-2 number, since 2×1243433321359² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243433325359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621716660679 + 621716660680.

It is an arithmetic number, because the mean of its divisors is an integer number (621716660680).

Almost surely, 2^{1243433321359} is an apocalyptic number.

1243433321359 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243433321359 is an equidigital number, since it uses as much as digits as its factorization.

1243433321359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 43.

The spelling of 1243433321359 in words is "one trillion, two hundred forty-three billion, four hundred thirty-three million, three hundred twenty-one thousand, three hundred fifty-nine".