9906973 has 2 divisors, whose sum is σ = 9906974. Its totient is φ = 9906972.

The previous prime is 9906943. The next prime is 9906983. The reversal of 9906973 is 3796099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9903609 + 3364 = 3147^2 + 58^2 .

It is an emirp because it is prime and its reverse (3796099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9906973 - 2²¹ = 7809821 is a prime.

It is a super-2 number, since 2×9906973² = 196296228045458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9906943) 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, 4953486 + 4953487.

It is an arithmetic number, because the mean of its divisors is an integer number (4953487).

Almost surely, 2^9906973 is an apocalyptic number.

It is an amenable number.

9906973 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906973 is an equidigital number, since it uses as much as digits as its factorization.

9906973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 9906973 is about 3147.5344319006. The cubic root of 9906973 is about 214.7733179628.

The spelling of 9906973 in words is "nine million, nine hundred six thousand, nine hundred seventy-three".