1312305343 has 2 divisors, whose sum is σ = 1312305344. Its totient is φ = 1312305342.

The previous prime is 1312305341. The next prime is 1312305367. The reversal of 1312305343 is 3435032131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312305343 - 2¹ = 1312305341 is a prime.

Together with 1312305341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312305341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656152671 + 656152672.

It is an arithmetic number, because the mean of its divisors is an integer number (656152672).

Almost surely, 2^1312305343 is an apocalyptic number.

1312305343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312305343 is an equidigital number, since it uses as much as digits as its factorization.

1312305343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 1312305343 is about 36225.7552440249. The cubic root of 1312305343 is about 1094.8256550542.

Adding to 1312305343 its reverse (3435032131), we get a palindrome (4747337474).

The spelling of 1312305343 in words is "one billion, three hundred twelve million, three hundred five thousand, three hundred forty-three".