990165 has 32 divisors (see below), whose sum is σ = 1835136. Its totient is φ = 450560.

The previous prime is 990163. The next prime is 990169. The reversal of 990165 is 561099.

990165 = T₄₄₀ + T₄₄₁ + ... + T₄₄₉.

It is not a de Polignac number, because 990165 - 2¹ = 990163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990163) 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 31 ways as a sum of consecutive naturals, for example, 2629 + ... + 2981.

It is an arithmetic number, because the mean of its divisors is an integer number (57348).

2⁹⁹⁰¹⁶⁵ is an apocalyptic number.

It is an amenable number.

990165 is a deficient number, since it is larger than the sum of its proper divisors (844971).

990165 is a wasteful number, since it uses less digits than its factorization.

990165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 990165 is about 995.0703492718. The cubic root of 990165 is about 99.6710860086.

The spelling of 990165 in words is "nine hundred ninety thousand, one hundred sixty-five".