165833449 has 4 divisors (see below), whose sum is σ = 168962436. Its totient is φ = 162704464.

The previous prime is 165833417. The next prime is 165833461. The reversal of 165833449 is 944338561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944338561 = 1123 ⋅840907.

It can be written as a sum of positive squares in 2 ways, for example, as 72131049 + 93702400 = 8493^2 + 9680^2 .

It is a cyclic number.

It is not a de Polignac number, because 165833449 - 2⁵ = 165833417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165830449) 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, 1564414 + ... + 1564519.

It is an arithmetic number, because the mean of its divisors is an integer number (42240609).

Almost surely, 2^165833449 is an apocalyptic number.

It is an amenable number.

165833449 is a deficient number, since it is larger than the sum of its proper divisors (3128987).

165833449 is an equidigital number, since it uses as much as digits as its factorization.

165833449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128986.

The product of its digits is 311040, while the sum is 43.

The square root of 165833449 is about 12877.6336723794. The cubic root of 165833449 is about 549.4026009387.

The spelling of 165833449 in words is "one hundred sixty-five million, eight hundred thirty-three thousand, four hundred forty-nine".