1310643643 has 2 divisors, whose sum is σ = 1310643644. Its totient is φ = 1310643642.

The previous prime is 1310643613. The next prime is 1310643647. The reversal of 1310643643 is 3463460131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3463460131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1310643643 is a prime.

It is a super-2 number, since 2×1310643643² = 3435573517872622898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1310643647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655321821 + 655321822.

It is an arithmetic number, because the mean of its divisors is an integer number (655321822).

Almost surely, 2^1310643643 is an apocalyptic number.

1310643643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310643643 is an equidigital number, since it uses as much as digits as its factorization.

1310643643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 1310643643 is about 36202.8126393517. The cubic root of 1310643643 is about 1094.3633540552.

The spelling of 1310643643 in words is "one billion, three hundred ten million, six hundred forty-three thousand, six hundred forty-three".