9820505 has 4 divisors (see below), whose sum is σ = 11784612. Its totient is φ = 7856400.

The previous prime is 9820493. The next prime is 9820513. The reversal of 9820505 is 5050289.

9820505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2247001 + 7573504 = 1499^2 + 2752^2 .

It is not a de Polignac number, because 9820505 - 2⁸ = 9820249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982046 + ... + 982055.

It is an arithmetic number, because the mean of its divisors is an integer number (2946153).

Almost surely, 2^9820505 is an apocalyptic number.

It is an amenable number.

9820505 is a deficient number, since it is larger than the sum of its proper divisors (1964107).

9820505 is a wasteful number, since it uses less digits than its factorization.

9820505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964106.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 9820505 is about 3133.7684981504. The cubic root of 9820505 is about 214.1466444733.

The spelling of 9820505 in words is "nine million, eight hundred twenty thousand, five hundred five".