9780165 has 12 divisors (see below), whose sum is σ = 16952364. Its totient is φ = 5216064.

The previous prime is 9780157. The next prime is 9780167. The reversal of 9780165 is 5610879.

9780165 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1520289 + 8259876 = 1233^2 + 2874^2 .

It is not a de Polignac number, because 9780165 - 2³ = 9780157 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9780167) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 108624 + ... + 108713.

It is an arithmetic number, because the mean of its divisors is an integer number (1412697).

Almost surely, 2^9780165 is an apocalyptic number.

It is an amenable number.

9780165 is a deficient number, since it is larger than the sum of its proper divisors (7172199).

9780165 is a wasteful number, since it uses less digits than its factorization.

9780165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217348 (or 217345 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 9780165 is about 3127.3255347021. The cubic root of 9780165 is about 213.8530230774.

The spelling of 9780165 in words is "nine million, seven hundred eighty thousand, one hundred sixty-five".