1244322313 has 4 divisors (see below), whose sum is σ = 1340039428. Its totient is φ = 1148605200.

The previous prime is 1244322311. The next prime is 1244322341. The reversal of 1244322313 is 3132234421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3132234421 = 59 ⋅53088719.

It can be written as a sum of positive squares in 2 ways, for example, as 61512649 + 1182809664 = 7843^2 + 34392^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244322313 - 2¹ = 1244322311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1244322311) 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 3 ways as a sum of consecutive naturals, for example, 47858538 + ... + 47858563.

It is an arithmetic number, because the mean of its divisors is an integer number (335009857).

Almost surely, 2^1244322313 is an apocalyptic number.

1244322313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1244322313 is a deficient number, since it is larger than the sum of its proper divisors (95717115).

1244322313 is an equidigital number, since it uses as much as digits as its factorization.

1244322313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95717114.

The product of its digits is 3456, while the sum is 25.

The square root of 1244322313 is about 35274.9530545400. The cubic root of 1244322313 is about 1075.5839086323.

Adding to 1244322313 its reverse (3132234421), we get a palindrome (4376556734).

The spelling of 1244322313 in words is "one billion, two hundred forty-four million, three hundred twenty-two thousand, three hundred thirteen".