1243361613 has 32 divisors (see below), whose sum is σ = 1834221312. Its totient is φ = 744307200.

The previous prime is 1243361591. The next prime is 1243361627. The reversal of 1243361613 is 3161633421.

It is not a de Polignac number, because 1243361613 - 2⁶ = 1243361549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243311613) 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 in 31 ways as a sum of consecutive naturals, for example, 672256 + ... + 674102.

It is an arithmetic number, because the mean of its divisors is an integer number (57319416).

Almost surely, 2^1243361613 is an apocalyptic number.

1243361613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1243361613 is a deficient number, since it is larger than the sum of its proper divisors (590859699).

1243361613 is a wasteful number, since it uses less digits than its factorization.

1243361613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325.

The product of its digits is 7776, while the sum is 30.

The square root of 1243361613 is about 35261.3331143336. Note that the first 3 decimals coincide. The cubic root of 1243361613 is about 1075.3070298061.

The spelling of 1243361613 in words is "one billion, two hundred forty-three million, three hundred sixty-one thousand, six hundred thirteen".