165252169 has 2 divisors, whose sum is σ = 165252170. Its totient is φ = 165252168.

The previous prime is 165252167. The next prime is 165252209. The reversal of 165252169 is 961252561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163328400 + 1923769 = 12780^2 + 1387^2 .

It is a cyclic number.

It is not a de Polignac number, because 165252169 - 2¹ = 165252167 is a prime.

It is a super-2 number, since 2×165252169² = 54616558718409122, which contains 22 as substring.

Together with 165252167, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (165252161) 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 as a sum of consecutive naturals, namely, 82626084 + 82626085.

It is an arithmetic number, because the mean of its divisors is an integer number (82626085).

Almost surely, 2^165252169 is an apocalyptic number.

It is an amenable number.

165252169 is a deficient number, since it is larger than the sum of its proper divisors (1).

165252169 is an equidigital number, since it uses as much as digits as its factorization.

165252169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The square root of 165252169 is about 12855.0444962279. The cubic root of 165252169 is about 548.7599267960.

The spelling of 165252169 in words is "one hundred sixty-five million, two hundred fifty-two thousand, one hundred sixty-nine".