9664864213 has 2 divisors, whose sum is σ = 9664864214. Its totient is φ = 9664864212.

The previous prime is 9664864207. The next prime is 9664864229. The reversal of 9664864213 is 3124684669.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9651490564 + 13373649 = 98242^2 + 3657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9664864213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9664864613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832432106 + 4832432107.

It is an arithmetic number, because the mean of its divisors is an integer number (4832432107).

Almost surely, 2^9664864213 is an apocalyptic number.

It is an amenable number.

9664864213 is a deficient number, since it is larger than the sum of its proper divisors (1).

9664864213 is an equidigital number, since it uses as much as digits as its factorization.

9664864213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 49.

The square root of 9664864213 is about 98310.0412623248. The cubic root of 9664864213 is about 2130.0931001060.

The spelling of 9664864213 in words is "nine billion, six hundred sixty-four million, eight hundred sixty-four thousand, two hundred thirteen".