9973213 has 2 divisors, whose sum is σ = 9973214. Its totient is φ = 9973212.

The previous prime is 9973211. The next prime is 9973217. The reversal of 9973213 is 3123799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5212089 + 4761124 = 2283^2 + 2182^2 .

It is a cyclic number.

It is not a de Polignac number, because 9973213 - 2¹ = 9973211 is a prime.

Together with 9973211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9973211) 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, 4986606 + 4986607.

It is an arithmetic number, because the mean of its divisors is an integer number (4986607).

Almost surely, 2^9973213 is an apocalyptic number.

It is an amenable number.

9973213 is a deficient number, since it is larger than the sum of its proper divisors (1).

9973213 is an equidigital number, since it uses as much as digits as its factorization.

9973213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 34.

The square root of 9973213 is about 3158.0394234398. The cubic root of 9973213 is about 215.2509275069.

The spelling of 9973213 in words is "nine million, nine hundred seventy-three thousand, two hundred thirteen".