1608109 has 2 divisors, whose sum is σ = 1608110. Its totient is φ = 1608108.

The previous prime is 1608107. The next prime is 1608127. The reversal of 1608109 is 9018061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 770884 = 915^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1608109 - 2¹ = 1608107 is a prime.

Together with 1608107, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1608107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804054 + 804055.

It is an arithmetic number, because the mean of its divisors is an integer number (804055).

2^1608109 is an apocalyptic number.

It is an amenable number.

1608109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1608109 is an equidigital number, since it uses as much as digits as its factorization.

1608109 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 1608109 is about 1268.1123767238. The cubic root of 1608109 is about 117.1579671594.

The spelling of 1608109 in words is "one million, six hundred eight thousand, one hundred nine".