9943679513 has 2 divisors, whose sum is σ = 9943679514. Its totient is φ = 9943679512.

The previous prime is 9943679483. The next prime is 9943679527. The reversal of 9943679513 is 3159763499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7333695769 + 2609983744 = 85637^2 + 51088^2 .

It is a cyclic number.

It is not a de Polignac number, because 9943679513 - 2¹⁰ = 9943678489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9943679563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971839756 + 4971839757.

It is an arithmetic number, because the mean of its divisors is an integer number (4971839757).

Almost surely, 2^9943679513 is an apocalyptic number.

It is an amenable number.

9943679513 is a deficient number, since it is larger than the sum of its proper divisors (1).

9943679513 is an equidigital number, since it uses as much as digits as its factorization.

9943679513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 56.

The square root of 9943679513 is about 99717.9999448445. Note that the first 4 decimals coincide. The cubic root of 9943679513 is about 2150.3824459733.

The spelling of 9943679513 in words is "nine billion, nine hundred forty-three million, six hundred seventy-nine thousand, five hundred thirteen".