1317715643 has 2 divisors, whose sum is σ = 1317715644. Its totient is φ = 1317715642.

The previous prime is 1317715591. The next prime is 1317715681. The reversal of 1317715643 is 3465177131.

It is an a-pointer prime, because the next prime (1317715681) can be obtained adding 1317715643 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1317715643 - 2¹⁶ = 1317650107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1317715597 and 1317715606.

It is not a weakly prime, because it can be changed into another prime (1317715943) 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, 658857821 + 658857822.

It is an arithmetic number, because the mean of its divisors is an integer number (658857822).

Almost surely, 2^1317715643 is an apocalyptic number.

1317715643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317715643 is an equidigital number, since it uses as much as digits as its factorization.

1317715643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 1317715643 is about 36300.3532076480. The cubic root of 1317715643 is about 1096.3281543856.

The spelling of 1317715643 in words is "one billion, three hundred seventeen million, seven hundred fifteen thousand, six hundred forty-three".