9820109 has 4 divisors (see below), whose sum is σ = 10575516. Its totient is φ = 9064704.

The previous prime is 9820099. The next prime is 9820117. The reversal of 9820109 is 9010289.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9010289 = 17 ⋅530017.

It can be written as a sum of positive squares in 2 ways, for example, as 4012009 + 5808100 = 2003^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 9820109 - 2⁸ = 9819853 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 (9820159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377684 + ... + 377709.

It is an arithmetic number, because the mean of its divisors is an integer number (2643879).

Almost surely, 2^9820109 is an apocalyptic number.

It is an amenable number.

9820109 is a deficient number, since it is larger than the sum of its proper divisors (755407).

9820109 is a wasteful number, since it uses less digits than its factorization.

9820109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755406.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 9820109 is about 3133.7053147991. The cubic root of 9820109 is about 214.1437660330.

The spelling of 9820109 in words is "nine million, eight hundred twenty thousand, one hundred nine".