1611609 has 8 divisors (see below), whose sum is σ = 2207040. Its totient is φ = 1045296.

The previous prime is 1611607. The next prime is 1611613. The reversal of 1611609 is 9061161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1611609 - 2¹ = 1611607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1611601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7149 + ... + 7370.

It is an arithmetic number, because the mean of its divisors is an integer number (275880).

2^1611609 is an apocalyptic number.

It is an amenable number.

1611609 is a deficient number, since it is larger than the sum of its proper divisors (595431).

1611609 is a wasteful number, since it uses less digits than its factorization.

1611609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14559.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1611609 is about 1269.4916305356. The cubic root of 1611609 is about 117.2429024789.

It can be divided in two parts, 161 and 1609, that added together give a triangular number (1770 = T₅₉).

The spelling of 1611609 in words is "one million, six hundred eleven thousand, six hundred nine".