165075109 has 2 divisors, whose sum is σ = 165075110. Its totient is φ = 165075108.

The previous prime is 165075101. The next prime is 165075121. The reversal of 165075109 is 901570561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134792100 + 30283009 = 11610^2 + 5503^2 .

It is a cyclic number.

It is not a de Polignac number, because 165075109 - 2³ = 165075101 is a prime.

It is a super-2 number, since 2×165075109² = 54499583222723762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165075101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82537554 + 82537555.

It is an arithmetic number, because the mean of its divisors is an integer number (82537555).

Almost surely, 2^165075109 is an apocalyptic number.

It is an amenable number.

165075109 is a deficient number, since it is larger than the sum of its proper divisors (1).

165075109 is an equidigital number, since it uses as much as digits as its factorization.

165075109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 165075109 is about 12848.1558598890. The cubic root of 165075109 is about 548.5638665246.

The spelling of 165075109 in words is "one hundred sixty-five million, seventy-five thousand, one hundred nine".