1609109 has 2 divisors, whose sum is σ = 1609110. Its totient is φ = 1609108.

The previous prime is 1609099. The next prime is 1609141. The reversal of 1609109 is 9019061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 228484 = 1175^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1609109 - 2¹² = 1605013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1609199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804554 + 804555.

It is an arithmetic number, because the mean of its divisors is an integer number (804555).

2^1609109 is an apocalyptic number.

It is an amenable number.

1609109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609109 is an equidigital number, since it uses as much as digits as its factorization.

1609109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 1609109 is about 1268.5066022690. The cubic root of 1609109 is about 117.1822469586.

The spelling of 1609109 in words is "one million, six hundred nine thousand, one hundred nine".