165262189 has 2 divisors, whose sum is σ = 165262190. Its totient is φ = 165262188.

The previous prime is 165262187. The next prime is 165262211. The reversal of 165262189 is 981262561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162129289 + 3132900 = 12733^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 165262189 - 2¹ = 165262187 is a prime.

It is a super-2 number, since 2×165262189² = 54623182226143442, which contains 22 as substring.

Together with 165262187, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165262187) 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, 82631094 + 82631095.

It is an arithmetic number, because the mean of its divisors is an integer number (82631095).

Almost surely, 2^165262189 is an apocalyptic number.

It is an amenable number.

165262189 is a deficient number, since it is larger than the sum of its proper divisors (1).

165262189 is an equidigital number, since it uses as much as digits as its factorization.

165262189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 165262189 is about 12855.4342205933. The cubic root of 165262189 is about 548.7710178523.

The spelling of 165262189 in words is "one hundred sixty-five million, two hundred sixty-two thousand, one hundred eighty-nine".