9959041993 has 2 divisors, whose sum is σ = 9959041994. Its totient is φ = 9959041992.

The previous prime is 9959041943. The next prime is 9959042029. The reversal of 9959041993 is 3991409599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6591328969 + 3367713024 = 81187^2 + 58032^2 .

It is an emirp because it is prime and its reverse (3991409599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9959041993 - 2⁹ = 9959041481 is a prime.

It is not a weakly prime, because it can be changed into another prime (9959041943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979520996 + 4979520997.

It is an arithmetic number, because the mean of its divisors is an integer number (4979520997).

Almost surely, 2^9959041993 is an apocalyptic number.

It is an amenable number.

9959041993 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959041993 is an equidigital number, since it uses as much as digits as its factorization.

9959041993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3542940, while the sum is 58.

The square root of 9959041993 is about 99794.9998396713. Note that the first 3 decimals coincide. The cubic root of 9959041993 is about 2151.4892867322.

The spelling of 9959041993 in words is "nine billion, nine hundred fifty-nine million, forty-one thousand, nine hundred ninety-three".