165284987 has 12 divisors (see below), whose sum is σ = 193978296. Its totient is φ = 140414400.

The previous prime is 165284941. The next prime is 165284989. The reversal of 165284987 is 789482561.

It is not a de Polignac number, because 165284987 - 2⁸ = 165284731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165284989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9389 + ... + 20462.

It is an arithmetic number, because the mean of its divisors is an integer number (16164858).

Almost surely, 2^165284987 is an apocalyptic number.

165284987 is a deficient number, since it is larger than the sum of its proper divisors (28693309).

165284987 is a wasteful number, since it uses less digits than its factorization.

165284987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29978 (or 29971 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 165284987 is about 12856.3208967418. The cubic root of 165284987 is about 548.7962511024.

The spelling of 165284987 in words is "one hundred sixty-five million, two hundred eighty-four thousand, nine hundred eighty-seven".