1312986943 has 2 divisors, whose sum is σ = 1312986944. Its totient is φ = 1312986942.

The previous prime is 1312986937. The next prime is 1312986991. The reversal of 1312986943 is 3496892131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312986943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312986893 and 1312986902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312986923) 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, 656493471 + 656493472.

It is an arithmetic number, because the mean of its divisors is an integer number (656493472).

Almost surely, 2^1312986943 is an apocalyptic number.

1312986943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312986943 is an equidigital number, since it uses as much as digits as its factorization.

1312986943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 1312986943 is about 36235.1616941335. The cubic root of 1312986943 is about 1095.0151698933.

The spelling of 1312986943 in words is "one billion, three hundred twelve million, nine hundred eighty-six thousand, nine hundred forty-three".