1244212313 has 2 divisors, whose sum is σ = 1244212314. Its totient is φ = 1244212312.

The previous prime is 1244212261. The next prime is 1244212331. The reversal of 1244212313 is 3132124421.

Together with next prime (1244212331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 809573209 + 434639104 = 28453^2 + 20848^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244212313 - 2²² = 1240018009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244214313) 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 as a sum of consecutive naturals, namely, 622106156 + 622106157.

It is an arithmetic number, because the mean of its divisors is an integer number (622106157).

Almost surely, 2^1244212313 is an apocalyptic number.

It is an amenable number.

1244212313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244212313 is an equidigital number, since it uses as much as digits as its factorization.

1244212313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 1244212313 is about 35273.3938401169. The cubic root of 1244212313 is about 1075.5522132761.

Adding to 1244212313 its reverse (3132124421), we get a palindrome (4376336734).

The spelling of 1244212313 in words is "one billion, two hundred forty-four million, two hundred twelve thousand, three hundred thirteen".