9720002213 has 2 divisors, whose sum is σ = 9720002214. Its totient is φ = 9720002212.

The previous prime is 9720002191. The next prime is 9720002221. The reversal of 9720002213 is 3122000279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5523165124 + 4196837089 = 74318^2 + 64783^2 .

It is an emirp because it is prime and its reverse (3122000279) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9720002213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9720002293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860001106 + 4860001107.

It is an arithmetic number, because the mean of its divisors is an integer number (4860001107).

Almost surely, 2^9720002213 is an apocalyptic number.

It is an amenable number.

9720002213 is a deficient number, since it is larger than the sum of its proper divisors (1).

9720002213 is an equidigital number, since it uses as much as digits as its factorization.

9720002213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 9720002213 is about 98590.0715741702. The cubic root of 9720002213 is about 2134.1361446571.

The spelling of 9720002213 in words is "nine billion, seven hundred twenty million, two thousand, two hundred thirteen".