9973811 has 2 divisors, whose sum is σ = 9973812. Its totient is φ = 9973810.

The previous prime is 9973793. The next prime is 9973813. The reversal of 9973811 is 1183799.

9973811 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1183799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9973811 is a prime.

It is a Sophie Germain prime.

Together with 9973813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9973813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986905 + 4986906.

It is an arithmetic number, because the mean of its divisors is an integer number (4986906).

Almost surely, 2^9973811 is an apocalyptic number.

9973811 is a deficient number, since it is larger than the sum of its proper divisors (1).

9973811 is an equidigital number, since it uses as much as digits as its factorization.

9973811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 38.

The square root of 9973811 is about 3158.1341010160. The cubic root of 9973811 is about 215.2552296137.

The spelling of 9973811 in words is "nine million, nine hundred seventy-three thousand, eight hundred eleven".