1243444413 has 16 divisors (see below), whose sum is σ = 1761808320. Its totient is φ = 777374976.

The previous prime is 1243444409. The next prime is 1243444421. The reversal of 1243444413 is 3144443421.

It is not a de Polignac number, because 1243444413 - 2² = 1243444409 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243444403) 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 in 15 ways as a sum of consecutive naturals, for example, 29883 + ... + 58136.

It is an arithmetic number, because the mean of its divisors is an integer number (110113020).

Almost surely, 2^1243444413 is an apocalyptic number.

It is an amenable number.

1243444413 is a deficient number, since it is larger than the sum of its proper divisors (518363907).

1243444413 is a wasteful number, since it uses less digits than its factorization.

1243444413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88316.

The product of its digits is 18432, while the sum is 30.

The square root of 1243444413 is about 35262.5071853945. The cubic root of 1243444413 is about 1075.3308988197.

Adding to 1243444413 its reverse (3144443421), we get a palindrome (4387887834).

The spelling of 1243444413 in words is "one billion, two hundred forty-three million, four hundred forty-four thousand, four hundred thirteen".