165489143 has 4 divisors (see below), whose sum is σ = 167820048. Its totient is φ = 163158240.

The previous prime is 165489139. The next prime is 165489179. The reversal of 165489143 is 341984561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165489143 - 2² = 165489139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165489143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165489113) 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, 1165346 + ... + 1165487.

It is an arithmetic number, because the mean of its divisors is an integer number (41955012).

Almost surely, 2^165489143 is an apocalyptic number.

165489143 is a deficient number, since it is larger than the sum of its proper divisors (2330905).

165489143 is an equidigital number, since it uses as much as digits as its factorization.

165489143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330904.

The product of its digits is 103680, while the sum is 41.

The square root of 165489143 is about 12864.2583540599. The cubic root of 165489143 is about 549.0221114006.

The spelling of 165489143 in words is "one hundred sixty-five million, four hundred eighty-nine thousand, one hundred forty-three".