1312240313 has 2 divisors, whose sum is σ = 1312240314. Its totient is φ = 1312240312.

The previous prime is 1312240309. The next prime is 1312240337. The reversal of 1312240313 is 3130422131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1298305024 + 13935289 = 36032^2 + 3733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312240313 - 2² = 1312240309 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312240213) 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 as a sum of consecutive naturals, namely, 656120156 + 656120157.

It is an arithmetic number, because the mean of its divisors is an integer number (656120157).

Almost surely, 2^1312240313 is an apocalyptic number.

It is an amenable number.

1312240313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312240313 is an equidigital number, since it uses as much as digits as its factorization.

1312240313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1312240313 is about 36224.8576670772. The cubic root of 1312240313 is about 1094.8075704194.

Adding to 1312240313 its reverse (3130422131), we get a palindrome (4442662444).

It can be divided in two parts, 13122 and 40313, that added together give a palindrome (53435).

The spelling of 1312240313 in words is "one billion, three hundred twelve million, two hundred forty thousand, three hundred thirteen".