9906943 has 2 divisors, whose sum is σ = 9906944. Its totient is φ = 9906942.

The previous prime is 9906931. The next prime is 9906973. The reversal of 9906943 is 3496099.

It is a weak prime.

It is an emirp because it is prime and its reverse (3496099) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9906943 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9906896 and 9906905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9906973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4953471 + 4953472.

It is an arithmetic number, because the mean of its divisors is an integer number (4953472).

Almost surely, 2^9906943 is an apocalyptic number.

9906943 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906943 is an equidigital number, since it uses as much as digits as its factorization.

9906943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 9906943 is about 3147.5296662621. The cubic root of 9906943 is about 214.7731011725.

The spelling of 9906943 in words is "nine million, nine hundred six thousand, nine hundred forty-three".