1243413559 has 2 divisors, whose sum is σ = 1243413560. Its totient is φ = 1243413558.

The previous prime is 1243413553. The next prime is 1243413581. The reversal of 1243413559 is 9553143421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1243413559 - 2¹³ = 1243405367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243413553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621706779 + 621706780.

It is an arithmetic number, because the mean of its divisors is an integer number (621706780).

Almost surely, 2^1243413559 is an apocalyptic number.

1243413559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243413559 is an equidigital number, since it uses as much as digits as its factorization.

1243413559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 1243413559 is about 35262.0696925180. The cubic root of 1243413559 is about 1075.3220045650.

The spelling of 1243413559 in words is "one billion, two hundred forty-three million, four hundred thirteen thousand, five hundred fifty-nine".