1312303543 has 2 divisors, whose sum is σ = 1312303544. Its totient is φ = 1312303542.

The previous prime is 1312303537. The next prime is 1312303589. The reversal of 1312303543 is 3453032131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312303543 - 2²⁵ = 1278749111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312303243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656151771 + 656151772.

It is an arithmetic number, because the mean of its divisors is an integer number (656151772).

Almost surely, 2^1312303543 is an apocalyptic number.

1312303543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312303543 is an equidigital number, since it uses as much as digits as its factorization.

1312303543 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 1312303543 is about 36225.7303998139. The cubic root of 1312303543 is about 1094.8251544880.

Adding to 1312303543 its reverse (3453032131), we get a palindrome (4765335674).

The spelling of 1312303543 in words is "one billion, three hundred twelve million, three hundred three thousand, five hundred forty-three".