168109 has 2 divisors, whose sum is σ = 168110. Its totient is φ = 168108.

The previous prime is 168089. The next prime is 168127. The reversal of 168109 is 901861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168100 + 9 = 410^2 + 3^2 .

It is an emirp because it is prime and its reverse (901861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168109 - 2⁹ = 167597 is a prime.

168109 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84054 + 84055.

It is an arithmetic number, because the mean of its divisors is an integer number (84055).

2¹⁶⁸¹⁰⁹ is an apocalyptic number.

It is an amenable number.

168109 is a deficient number, since it is larger than the sum of its proper divisors (1).

168109 is an equidigital number, since it uses as much as digits as its factorization.

168109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 168109 is about 410.0109754629. The cubic root of 168109 is about 55.1904143896.

The spelling of 168109 in words is "one hundred sixty-eight thousand, one hundred nine".