165065389 has 4 divisors (see below), whose sum is σ = 165304960. Its totient is φ = 164825820.

The previous prime is 165065377. The next prime is 165065401. The reversal of 165065389 is 983560561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (165065377) and next prime (165065401).

It is a cyclic number.

It is not a de Polignac number, because 165065389 - 2⁵ = 165065357 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 (165065309) 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, 118749 + ... + 120130.

It is an arithmetic number, because the mean of its divisors is an integer number (41326240).

Almost surely, 2^165065389 is an apocalyptic number.

It is an amenable number.

165065389 is a deficient number, since it is larger than the sum of its proper divisors (239571).

165065389 is an equidigital number, since it uses as much as digits as its factorization.

165065389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239570.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 165065389 is about 12847.7775899180. Note that the first 3 decimals coincide. The cubic root of 165065389 is about 548.5530994148.

The spelling of 165065389 in words is "one hundred sixty-five million, sixty-five thousand, three hundred eighty-nine".