165025389 has 4 divisors (see below), whose sum is σ = 220033856. Its totient is φ = 110016924.

The previous prime is 165025379. The next prime is 165025417. The reversal of 165025389 is 983520561.

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 not a de Polignac number, because 165025389 - 2¹⁶ = 164959853 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 (165025309) 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, 27504229 + ... + 27504234.

It is an arithmetic number, because the mean of its divisors is an integer number (55008464).

Almost surely, 2^165025389 is an apocalyptic number.

It is an amenable number.

165025389 is a deficient number, since it is larger than the sum of its proper divisors (55008467).

165025389 is an equidigital number, since it uses as much as digits as its factorization.

165025389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55008466.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 165025389 is about 12846.2208061359. The cubic root of 165025389 is about 548.5087858719.

The spelling of 165025389 in words is "one hundred sixty-five million, twenty-five thousand, three hundred eighty-nine".