10985813 has 2 divisors, whose sum is σ = 10985814. Its totient is φ = 10985812.

The previous prime is 10985803. The next prime is 10985831. The reversal of 10985813 is 31858901.

10985813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (10985831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9690769 + 1295044 = 3113^2 + 1138^2 .

It is a cyclic number.

It is not a de Polignac number, because 10985813 - 2¹⁰ = 10984789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10985803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5492906 + 5492907.

It is an arithmetic number, because the mean of its divisors is an integer number (5492907).

Almost surely, 2^10985813 is an apocalyptic number.

It is an amenable number.

10985813 is a deficient number, since it is larger than the sum of its proper divisors (1).

10985813 is an equidigital number, since it uses as much as digits as its factorization.

10985813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 10985813 is about 3314.4853295798. The cubic root of 10985813 is about 222.3023569976.

The spelling of 10985813 in words is "ten million, nine hundred eighty-five thousand, eight hundred thirteen".