1609006109 has 2 divisors, whose sum is σ = 1609006110. Its totient is φ = 1609006108.

The previous prime is 1609006081. The next prime is 1609006111. The reversal of 1609006109 is 9016009061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1567764025 + 41242084 = 39595^2 + 6422^2 .

It is an emirp because it is prime and its reverse (9016009061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1609006109 is a prime.

Together with 1609006111, 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 (1609006199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804503054 + 804503055.

It is an arithmetic number, because the mean of its divisors is an integer number (804503055).

Almost surely, 2^1609006109 is an apocalyptic number.

It is an amenable number.

1609006109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609006109 is an equidigital number, since it uses as much as digits as its factorization.

1609006109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1609006109 is about 40112.4183888232. The cubic root of 1609006109 is about 1171.7974925013.

The spelling of 1609006109 in words is "one billion, six hundred nine million, six thousand, one hundred nine".