9991343 has 2 divisors, whose sum is σ = 9991344. Its totient is φ = 9991342.

The previous prime is 9991337. The next prime is 9991349. The reversal of 9991343 is 3431999.

It is a balanced prime because it is at equal distance from previous prime (9991337) and next prime (9991349).

It is an emirp because it is prime and its reverse (3431999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9991343 - 2¹² = 9987247 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 9991297 and 9991306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9991349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995671 + 4995672.

It is an arithmetic number, because the mean of its divisors is an integer number (4995672).

Almost surely, 2^9991343 is an apocalyptic number.

9991343 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991343 is an equidigital number, since it uses as much as digits as its factorization.

9991343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 9991343 is about 3160.9085719141. The cubic root of 9991343 is about 215.3812812507.

The spelling of 9991343 in words is "nine million, nine hundred ninety-one thousand, three hundred forty-three".