2611609 has 16 divisors (see below), whose sum is σ = 3507840. Its totient is φ = 1877760.

The previous prime is 2611603. The next prime is 2611613. The reversal of 2611609 is 9061162.

2611609 = T₂₂₁ + T₂₂₂ + ... + T₂₉₇.

It is a cyclic number.

It is not a de Polignac number, because 2611609 - 2⁷ = 2611481 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2611603) 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 15 ways as a sum of consecutive naturals, for example, 304 + ... + 2305.

It is an arithmetic number, because the mean of its divisors is an integer number (219240).

2^2611609 is an apocalyptic number.

It is an amenable number.

2611609 is a deficient number, since it is larger than the sum of its proper divisors (896231).

2611609 is a wasteful number, since it uses less digits than its factorization.

2611609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2611609 is about 1616.0473384156. The cubic root of 2611609 is about 137.7112389473.

The spelling of 2611609 in words is "two million, six hundred eleven thousand, six hundred nine".