9975565993 has 2 divisors, whose sum is σ = 9975565994. Its totient is φ = 9975565992.

The previous prime is 9975565961. The next prime is 9975566047. The reversal of 9975565993 is 3995655799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6194791849 + 3780774144 = 78707^2 + 61488^2 .

It is an emirp because it is prime and its reverse (3995655799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9975565993 - 2⁵ = 9975565961 is a prime.

It is not a weakly prime, because it can be changed into another prime (9975565913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987782996 + 4987782997.

It is an arithmetic number, because the mean of its divisors is an integer number (4987782997).

Almost surely, 2^9975565993 is an apocalyptic number.

It is an amenable number.

9975565993 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975565993 is an equidigital number, since it uses as much as digits as its factorization.

9975565993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103335750, while the sum is 67.

The square root of 9975565993 is about 99877.7552461007. The cubic root of 9975565993 is about 2152.6785431876.

The spelling of 9975565993 in words is "nine billion, nine hundred seventy-five million, five hundred sixty-five thousand, nine hundred ninety-three".