165145369 has 2 divisors, whose sum is σ = 165145370. Its totient is φ = 165145368.

The previous prime is 165145367. The next prime is 165145399. The reversal of 165145369 is 963541561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104305369 + 60840000 = 10213^2 + 7800^2 .

It is a cyclic number.

It is not a de Polignac number, because 165145369 - 2¹ = 165145367 is a prime.

It is a super-2 number, since 2×165145369² = 54545985804292322, which contains 22 as substring.

Together with 165145367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (165145363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82572684 + 82572685.

It is an arithmetic number, because the mean of its divisors is an integer number (82572685).

Almost surely, 2^165145369 is an apocalyptic number.

It is an amenable number.

165145369 is a deficient number, since it is larger than the sum of its proper divisors (1).

165145369 is an equidigital number, since it uses as much as digits as its factorization.

165145369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 165145369 is about 12850.8898135499. The cubic root of 165145369 is about 548.6416828807.

The spelling of 165145369 in words is "one hundred sixty-five million, one hundred forty-five thousand, three hundred sixty-nine".