1312717843 has 2 divisors, whose sum is σ = 1312717844. Its totient is φ = 1312717842.

The previous prime is 1312717823. The next prime is 1312717859. The reversal of 1312717843 is 3487172131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312717843 - 2¹⁷ = 1312586771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312717823) 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, 656358921 + 656358922.

It is an arithmetic number, because the mean of its divisors is an integer number (656358922).

Almost surely, 2^1312717843 is an apocalyptic number.

1312717843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312717843 is an equidigital number, since it uses as much as digits as its factorization.

1312717843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 1312717843 is about 36231.4482597646. The cubic root of 1312717843 is about 1094.9403560710.

Adding to 1312717843 its reverse (3487172131), we get a palindrome (4799889974).

The spelling of 1312717843 in words is "one billion, three hundred twelve million, seven hundred seventeen thousand, eight hundred forty-three".