165163249 has 2 divisors, whose sum is σ = 165163250. Its totient is φ = 165163248.

The previous prime is 165163213. The next prime is 165163259. The reversal of 165163249 is 942361561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155127025 + 10036224 = 12455^2 + 3168^2 .

It is a cyclic number.

It is not a de Polignac number, because 165163249 - 2⁹ = 165162737 is a prime.

It is not a weakly prime, because it can be changed into another prime (165163259) 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, 82581624 + 82581625.

It is an arithmetic number, because the mean of its divisors is an integer number (82581625).

Almost surely, 2^165163249 is an apocalyptic number.

It is an amenable number.

165163249 is a deficient number, since it is larger than the sum of its proper divisors (1).

165163249 is an equidigital number, since it uses as much as digits as its factorization.

165163249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 165163249 is about 12851.5854663929. The cubic root of 165163249 is about 548.6614823243.

The spelling of 165163249 in words is "one hundred sixty-five million, one hundred sixty-three thousand, two hundred forty-nine".