2071609 has 4 divisors (see below), whose sum is σ = 2074660. Its totient is φ = 2068560.

The previous prime is 2071591. The next prime is 2071613. The reversal of 2071609 is 9061702.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1763584 + 308025 = 1328^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071609 - 2⁷ = 2071481 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2071649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7 + ... + 2035.

It is an arithmetic number, because the mean of its divisors is an integer number (518665).

2^2071609 is an apocalyptic number.

It is an amenable number.

2071609 is a deficient number, since it is larger than the sum of its proper divisors (3051).

2071609 is a wasteful number, since it uses less digits than its factorization.

2071609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 2071609 is about 1439.3085145305. The cubic root of 2071609 is about 127.4782020918.

The spelling of 2071609 in words is "two million, seventy-one thousand, six hundred nine".