165316369 has 4 divisors (see below), whose sum is σ = 165698596. Its totient is φ = 164934144.

The previous prime is 165316363. The next prime is 165316373. The reversal of 165316369 is 963613561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 963613561 = 953 ⋅1011137.

It can be written as a sum of positive squares in 2 ways, for example, as 63043600 + 102272769 = 7940^2 + 10113^2 .

It is a cyclic number.

It is not a de Polignac number, because 165316369 - 2⁵ = 165316337 is a prime.

It is a super-2 number, since 2×165316369² = 54659003718688322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165316363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190464 + ... + 191329.

It is an arithmetic number, because the mean of its divisors is an integer number (41424649).

Almost surely, 2^165316369 is an apocalyptic number.

It is an amenable number.

165316369 is a deficient number, since it is larger than the sum of its proper divisors (382227).

165316369 is an equidigital number, since it uses as much as digits as its factorization.

165316369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382226.

The product of its digits is 87480, while the sum is 40.

The square root of 165316369 is about 12857.5413279522. The cubic root of 165316369 is about 548.8309814882.

The spelling of 165316369 in words is "one hundred sixty-five million, three hundred sixteen thousand, three hundred sixty-nine".