9827020405 has 4 divisors (see below), whose sum is σ = 11792424492. Its totient is φ = 7861616320.

The previous prime is 9827020403. The next prime is 9827020421. The reversal of 9827020405 is 5040207289.

9827020405 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 7070455396 + 2756565009 = 84086^2 + 52503^2 .

It is not a de Polignac number, because 9827020405 - 2¹ = 9827020403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9827020403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982702036 + ... + 982702045.

It is an arithmetic number, because the mean of its divisors is an integer number (2948106123).

Almost surely, 2^9827020405 is an apocalyptic number.

It is an amenable number.

9827020405 is a deficient number, since it is larger than the sum of its proper divisors (1965404087).

9827020405 is a wasteful number, since it uses less digits than its factorization.

9827020405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965404086.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 9827020405 is about 99131.3290791564. The cubic root of 9827020405 is about 2141.9399246851.

The spelling of 9827020405 in words is "nine billion, eight hundred twenty-seven million, twenty thousand, four hundred five".