1243344213 has 6 divisors (see below), whose sum is σ = 1795941654. Its totient is φ = 828896136.

The previous prime is 1243344169. The next prime is 1243344227. The reversal of 1243344213 is 3124433421.

1243344213 is a `hidden beast` number, since 12 + 433 + 4 + 4 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 882268209 + 361076004 = 29703^2 + 19002^2 .

It is not a de Polignac number, because 1243344213 - 2¹² = 1243340117 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 (1243344413) 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 5 ways as a sum of consecutive naturals, for example, 69074670 + ... + 69074687.

It is an arithmetic number, because the mean of its divisors is an integer number (299323609).

Almost surely, 2^1243344213 is an apocalyptic number.

It is an amenable number.

1243344213 is a deficient number, since it is larger than the sum of its proper divisors (552597441).

1243344213 is a wasteful number, since it uses less digits than its factorization.

1243344213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138149363 (or 138149360 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 1243344213 is about 35261.0863842849. The cubic root of 1243344213 is about 1075.3020137192.

Adding to 1243344213 its reverse (3124433421), we get a palindrome (4367777634).

The spelling of 1243344213 in words is "one billion, two hundred forty-three million, three hundred forty-four thousand, two hundred thirteen".