1243109603 has 2 divisors, whose sum is σ = 1243109604. Its totient is φ = 1243109602.

The previous prime is 1243109551. The next prime is 1243109639. The reversal of 1243109603 is 3069013421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243109603 - 2¹⁴ = 1243093219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243109653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621554801 + 621554802.

It is an arithmetic number, because the mean of its divisors is an integer number (621554802).

Almost surely, 2^1243109603 is an apocalyptic number.

1243109603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243109603 is an equidigital number, since it uses as much as digits as its factorization.

1243109603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1243109603 is about 35257.7594722070. The cubic root of 1243109603 is about 1075.2343755779.

The spelling of 1243109603 in words is "one billion, two hundred forty-three million, one hundred nine thousand, six hundred three".