9839813 has 2 divisors, whose sum is σ = 9839814. Its totient is φ = 9839812.

The previous prime is 9839783. The next prime is 9839839. The reversal of 9839813 is 3189389.

9839813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7628644 + 2211169 = 2762^2 + 1487^2 .

It is a cyclic number.

It is not a de Polignac number, because 9839813 - 2⁶ = 9839749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9832813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4919906 + 4919907.

It is an arithmetic number, because the mean of its divisors is an integer number (4919907).

Almost surely, 2^9839813 is an apocalyptic number.

It is an amenable number.

9839813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9839813 is an equidigital number, since it uses as much as digits as its factorization.

9839813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 9839813 is about 3136.8476214187. The cubic root of 9839813 is about 214.2868964803.

The spelling of 9839813 in words is "nine million, eight hundred thirty-nine thousand, eight hundred thirteen".