999963849641 has 2 divisors, whose sum is σ = 999963849642. Its totient is φ = 999963849640.

The previous prime is 999963849617. The next prime is 999963849649. The reversal of 999963849641 is 146948369999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614074409641 + 385889440000 = 783629^2 + 621200^2 .

It is an emirp because it is prime and its reverse (146948369999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999963849641 is a prime.

It is a super-3 number, since 3×999963849641³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (999963849649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499981924820 + 499981924821.

It is an arithmetic number, because the mean of its divisors is an integer number (499981924821).

Almost surely, 2^999963849641 is an apocalyptic number.

It is an amenable number.

999963849641 is a deficient number, since it is larger than the sum of its proper divisors (1).

999963849641 is an equidigital number, since it uses as much as digits as its factorization.

999963849641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816293376, while the sum is 77.

The spelling of 999963849641 in words is "nine hundred ninety-nine billion, nine hundred sixty-three million, eight hundred forty-nine thousand, six hundred forty-one".