9993091943 has 2 divisors, whose sum is σ = 9993091944. Its totient is φ = 9993091942.

The previous prime is 9993091931. The next prime is 9993092063. The reversal of 9993091943 is 3491903999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9993091943 - 2⁸ = 9993091687 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9993091343) 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, 4996545971 + 4996545972.

It is an arithmetic number, because the mean of its divisors is an integer number (4996545972).

Almost surely, 2^9993091943 is an apocalyptic number.

9993091943 is a deficient number, since it is larger than the sum of its proper divisors (1).

9993091943 is an equidigital number, since it uses as much as digits as its factorization.

9993091943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2125764, while the sum is 56.

The square root of 9993091943 is about 99965.4537477823. The cubic root of 9993091943 is about 2153.9384771641.

The spelling of 9993091943 in words is "nine billion, nine hundred ninety-three million, ninety-one thousand, nine hundred forty-three".