1243433331247 has 2 divisors, whose sum is σ = 1243433331248. Its totient is φ = 1243433331246.

The previous prime is 1243433331191. The next prime is 1243433331271. The reversal of 1243433331247 is 7421333343421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243433331247 - 2³⁵ = 1209073592879 is a prime.

It is a super-2 number, since 2×1243433331247² (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 (1243433331347) 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, 621716665623 + 621716665624.

It is an arithmetic number, because the mean of its divisors is an integer number (621716665624).

Almost surely, 2^{1243433331247} is an apocalyptic number.

1243433331247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243433331247 is an equidigital number, since it uses as much as digits as its factorization.

1243433331247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 40.

Adding to 1243433331247 its reverse (7421333343421), we get a palindrome (8664766674668).

The spelling of 1243433331247 in words is "one trillion, two hundred forty-three billion, four hundred thirty-three million, three hundred thirty-one thousand, two hundred forty-seven".