9943597975231 has 2 divisors, whose sum is σ = 9943597975232. Its totient is φ = 9943597975230.

The previous prime is 9943597975163. The next prime is 9943597975237. The reversal of 9943597975231 is 1325797953499.

It is a strong prime.

It is an emirp because it is prime and its reverse (1325797953499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9943597975231 - 2²¹ = 9943595878079 is a prime.

It is a super-2 number, since 2×9943597975231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9943597975237) 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, 4971798987615 + 4971798987616.

It is an arithmetic number, because the mean of its divisors is an integer number (4971798987616).

Almost surely, 2^{9943597975231} is an apocalyptic number.

9943597975231 is a deficient number, since it is larger than the sum of its proper divisors (1).

9943597975231 is an equidigital number, since it uses as much as digits as its factorization.

9943597975231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 578680200, while the sum is 73.

The spelling of 9943597975231 in words is "nine trillion, nine hundred forty-three billion, five hundred ninety-seven million, nine hundred seventy-five thousand, two hundred thirty-one".