9967813 has 2 divisors, whose sum is σ = 9967814. Its totient is φ = 9967812.

The previous prime is 9967801. The next prime is 9967819. The reversal of 9967813 is 3187699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9529569 + 438244 = 3087^2 + 662^2 .

It is a cyclic number.

It is not a de Polignac number, because 9967813 - 2⁵ = 9967781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9967813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9967819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983906 + 4983907.

It is an arithmetic number, because the mean of its divisors is an integer number (4983907).

Almost surely, 2^9967813 is an apocalyptic number.

It is an amenable number.

9967813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9967813 is an equidigital number, since it uses as much as digits as its factorization.

9967813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 9967813 is about 3157.1843468508. The cubic root of 9967813 is about 215.2120712608.

The spelling of 9967813 in words is "nine million, nine hundred sixty-seven thousand, eight hundred thirteen".