1243344131 has 2 divisors, whose sum is σ = 1243344132. Its totient is φ = 1243344130.

The previous prime is 1243344127. The next prime is 1243344161. The reversal of 1243344131 is 1314433421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1243344131 - 2² = 1243344127 is a prime.

It is a super-2 number, since 2×1243344131² = 3091809256184290322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1243344131.

It is not a weakly prime, because it can be changed into another prime (1243344121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621672065 + 621672066.

It is an arithmetic number, because the mean of its divisors is an integer number (621672066).

Almost surely, 2^1243344131 is an apocalyptic number.

1243344131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243344131 is an equidigital number, since it uses as much as digits as its factorization.

1243344131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 1243344131 is about 35261.0852215300. The cubic root of 1243344131 is about 1075.3019900801.

Adding to 1243344131 its reverse (1314433421), we get a palindrome (2557777552).

The spelling of 1243344131 in words is "one billion, two hundred forty-three million, three hundred forty-four thousand, one hundred thirty-one".