1312320349 has 2 divisors, whose sum is σ = 1312320350. Its totient is φ = 1312320348.

The previous prime is 1312320319. The next prime is 1312320419. The reversal of 1312320349 is 9430232131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1225700100 + 86620249 = 35010^2 + 9307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312320349 - 2¹⁹ = 1311796061 is a prime.

It is a super-3 number, since 3×1312320349³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312320319) 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, 656160174 + 656160175.

It is an arithmetic number, because the mean of its divisors is an integer number (656160175).

Almost surely, 2^1312320349 is an apocalyptic number.

It is an amenable number.

1312320349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312320349 is an equidigital number, since it uses as much as digits as its factorization.

1312320349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1312320349 is about 36225.9623612679. The cubic root of 1312320349 is about 1094.8298280899.

The spelling of 1312320349 in words is "one billion, three hundred twelve million, three hundred twenty thousand, three hundred forty-nine".